On warzone if you have a weak AMD CPU compared to your AMD GPU, you will lose performance. SAM actually eats up CPU performance to provide more GPU performance. This will make a CPU bottleneck. My 5700X3D + RX 7800XT performs better with SAM off. CPU time with sam off is 4-5ms; SAM on 5-6ms. GPU time is running at 4-5ms
Also in MW3 Zombies if you have SAM On, when you look at the middle of the map (Old Town) fps drastically decreases. SAM Off solves that. (Thanks to BeefyTech channel video)
Does anybody know how to disable SAM for specific game (warzone) because when i go in tuning and global u can disable SAM, , but when u have more games added for different underclocks etc... there is no option for SAM ... Thanks
@@TechGuides considering i cant enable AMD SmartAccess Memory (Resizable bar) via AMD Adrenaline software for drivers etc.. yeah, im shocked how i cant find any info on this. I have a 9800x3d and an nvidia GPU.. ReBAR is enabled in bios AND the GPU settings show that REBAR is available but AMD Adrenaline says SAM is "UNSUPPORTED"
I found that when I forced reBAR on my 3080 wirh a Ryzen 7 5800x3D (2k res target), I could get some massive uplifts. The two games that come to mind were 'The Ascent' and 'Shadow of the Tomb Raider'. I used the Nvidia Inspect tool to force it on unsupported games. But I havent owned that card for more than a year, so I cant remember what other games off the top of my head.
Thank you so much for your videos. I honestly trust your videos more than anyone else’s, simply because of how much you explain. I’m very thankful that you made this your hobby lol
Tbh I only trust your tests as valid source. Other youtubers give as results like "I just prefer this" without any exact testing. Keep up the good work!👍 🙂
When I activated Resizable BAR SAM in the game I play, the stuttering was severe. When I activated it, the FPS went up, but that is not important. What is important is how stable and smooth the game is. In particular, The Last of Us Part 1 had severe stuttering. Sometimes, the loading is also slow.
Thanks for another great value video! Can you do one for input lag and latency? Theres so many confusing guides on youtube and most of it makes no sense! Keep up the good work legend!
Love your channel. Videos like this are the only ones worth watching. Finding optimized settings videos where everything is actually tested is difficult to find. Videos that provide dubious claims regarding performance improvements. There's just so much misinformation and garbage tier videos... It just isn't as click-baity unfortunately smh. Keep on going on! ✌
The whole ReBAR topic became a thing when Intel released ARC gpu’s. And when comparing Intel’s own statement for ARC and this video it is clear the factor of influence is how the GPU and its drivers are made and less about what CPU your system has. It would be nice if Intel or Amd or nVidia would explain the reason why there can be a difference and why sometimes not. I am sure there are engineers out there that can explain it. But i guess the suits of those companies forbid them to explain it in public.
Wonderful video. My pc is an all AMD machine. I have it enabled in bios and just go from there. So as if it's helping any I couldn't say but knowing I have it on and somesoftware will take advantage of it is fine with me.
If you have an Nvidia 8GB Vram card, enabling reBar might actually lower your fps since it consistently uses 600MB more Vram at least in Cyberpunk compared to just off, even though there's virtually no performance improvement. However in Vram constraint scenarios it will potentially lower overall fps. So yeah definitely keep it off like you said.
Cool vid and usefull as I have a retro system (Intel + nVidia) but the GPU still uses current drivers and recommends I enable r-bar but the motherboard doesn`t support this and after watching this video I don`t think I`ll worry about it as I was going to do my own testing which yes it seems the issue is more complicated than I realised. 👍
Muchas gracias por la información. En Warzone con Nvidia recomiendo desactivar REBAR porque genera stuttering y para jugar competitivamente, de hecho, hay que desactivarlo manualmente desde el documento de opciones en tu carpeta de documentos para tener un mejor y más fluido rendimiento.
I think this testing might be more beneficial on systems that are not running games in the hundreds of fps already. Would be interesting to see this on zen 2 with GTX cards / Amd 5xxx or 6xxx cards Going from 40 fps to 50 fps could make a game playable that otherwise is borderline. For instance Control has big differences when upping the graphics and there could be a huge benefit there.
I wouldn't expect the percentage differences to be much different on less powerful hardware, so in other words you likely wont be going from 40 to 50FPS (thats a 25% increase) using ReBAR but I didn't explicitly test this
@@TechGuides possibly not, but the Ryzen 3600 was the most purchased CPU so doing testing on that for instance would probably garner a decent amount of views.
Awesome video, would like to ask about this config, an amd based cpu with nvidia gpu, would it potentially perform the same as intel cpu and nvidia system?
@@TechGuides Why, though? The other mixed system isn't the same as either the intel + nvidia combo nor the amd + amd system, so why would this one be? It's also, as that poster mentions, a *very* common combo. Surprising that you didn't test it.
Just a quick thing i discovered today after finally upgrading to a Ryzen 5000 series CPU that supports re-BAR. I needed to also flash my RTX 3080 to latest VBios to get re-BAR support. My RTX 3080 was an older model and i never updated its VBios and was wondering why re-BAR could not be enabled.
Really good but your mixed scenario should include both sides not just intel with amd gpu but also amd with nvidia, this four scenarios would concrete the best use case for users that have the amd cpu and nvidia gpu.
Well let me just say I have the 7950X3D paired with RX7900XTX on ddr5 system memory of 32gb using resizeable bar and I must say ALL my game performance is phenomenal! The intent of that build is to blow away any and all future playstations! Yes I put alot of money into it but with all I can do with this amount of power is ridiculous! Although my setup is major OVERKILL but I wanted to blow the competition out the water!
@@TechGuides i mean amazing performance and have no problems smooth powerful gaming performance! What i don't understand is those who game why do they feel the need to buy a 4090, but sleep on that 7900XTX
SAM does some extra things on top of changing the BAR size. It's been too long so I don't remember anymore but SAM was always a bigger performance improvement than Nvidia's solution. I believe it was also less likely to decrease performance as well but I could be making that up.
I really never thought that SAM could be affecting my sistem like that, I have an i3 10100F with an RX 6700XT (I know about the bottle neck), and I will make tests to see if the performance reduction is there for me too
Game feels smoother with SAM disabled in the Adrenalin software, but when running benchmarks on MW2 multiplayer results are very similar, SAM off gave 5fps more, which is within the margin of error so I guess I'll leave it off
I had no more time but because of the lack of driver support for ReBar by Nvidia I wouldn't expect results to be much different from Intel & Nvidia (but I didn't test it, sorry)
that was insightful and it did explain a lot however in my case I have an amd cpu R5 3600 and an nividia gpu RTX3070 so should I enable RBar on my system or not?!!
MW3 in the benchmark with 7900 xtx and 5800x3d I get 10% higher 1% lows with SAM off, 220 vs 200, but 10% lower average, 300 vs 330. The CPU performance is way better better with it off since i dont have the best cpu
@Game Guides 10900k DDR4-4400 & 7900XTX MW3, low settings, Game Benchmark At any resolution, with Rebar On, my cpu 1% lows and overall 1% lows drop all they way down to 130fps. With Rebar Off the 1% lows on cpu and thus overall 1% lows jump to 240 +fps. Rebar Off seems like the way to go for my system.
Thats because you have an Intel CPU had you bought the 7800X 3D you would of received more gains from your 7900XTX since SAM allows the CPU full access to the GPU memory not just 256MB
Should have tried forcing it on via Nvidia Inspector, in titles that natively don't support it-- more specifically in games that are RAM/VRAM heavy, Think Microsoft Flight Simulator, XPLANE, F1 racing, and Digital Combat Simulator (DCS). These games are all generally pretty RAM/VRAM heavy, especially at higher resolutions/in VR
I have a Ryzen 5600X and and a RTX 3070. I had Resizable Bar enabled without knowing if it really helps or not (I haven't tested it directly). Recenty I had to disable this feature as it completely ruined my fps in Horizon Forbidden West. Without rebar, i have doubled fps and more consistent performance.
When I first heard of ReBAR, it sounded an awful lot like when you could plug in a hefty USB drive to offload some of the system RAM activity to it to 'speed up your main processor'. Going from one speed memory to another which, while larger in volume, moves at half the speed of native or far less, will not result in speeding up much of anything. Gaming I equally suspect, it will depend a lot more on both how much system RAM you have and at what speed it runs. If you have a large volume of system RAM but it's lower end DDR4, and a GPU with plenty of DDR6, there won't be much improvement (my working theory going into the next part). So recently I went from a 5900x with a 3070 to same CPU to a 7900XT. Granted the GPU more than doubling VRAM along with the better processing power made a world of difference, but as my main rig is still fairly old now, having reBAR on in the few games I played actually decreased FPS by about 20-30, title dependant.
The only combination that you did not cover is mine, actually😅 I have Ryzen 9700x and 4060 TI 16Gb, so that is AMD/NVIDIA combination. Should I enable it?
No unless you play Marvel Rivals. But even there you have to do a workaround to turn rebar on. The nvidia driver does not support rebar on pretty much any recent game (unless forced) so there is not much point in enabling it.
What about the "Core Isolation" option from Windows defenden in Windows 11? I've heard it's costing people 50 FPS on average if they turn it on. (Memory integrity)
With the Nvidia system you need to use inspector to enable it in not official supported games. Especially mw3, enable in bios, game config and inspector, redo shaders. Did you do this? Also you should test warzone not the in game benchmark. Measure 0.1% lows you will see the game runs horribly on any system with rebar on. Even though it boosts fps in a gpu bound situation. 0.1% lows are much more important. With the amd system disabling in the driver doesn't work it needs to be done via bios.
Thanks a lot for watching man! Ah I see, so my results for MW3 on the Nvidia GPU are identical because MW3 not officially supported 🤦♂️ I didn't force ReBAR using the inspector and I also didn't benchmark in Warzone. Guess I will have to specifically test in Warzone on my all-AMD system to observe the 1% low issue. Frankly, I don't think forcing ReBAR using the inspector makes sense...
In Red dead 2 , Helldivers 2 and Warhammer 40k Darktide i have improvement with ReBar ON On some games its good on others its not just test it - i have Nvidia Gpu and Amd Cpu
In this testing did you just enable default rebar in Nvidia control panel or did you manually go into profile inspect and enable rebar globally for all games? Nvidia has the option to force rebar for all games regardless, you just need to use the profile inspector to set it as on in the global profile.
Via bios. I didnt feel like enforcing it via the inspector would be great but given the fact none of the games I tested actually support rebar on Nvidia I probably should have.. ah well
I assume ATS/ETS2 are not supported, even though they just updated their game engine? I mostly play ATS on my 2700x/16GB/GTX 1080ti and lately fps has been getting worst with each game version update to their game engine.
Strange it doesn’t show that Warzone has a rebar but when you go into the Warzone documents and open it with notepad and scroll down you will see rebar true meaning it is activated.
It only works (natively) on AMD GPUs. On Nvidia you can force it using the Nvidia Inspector tool but I would highly recommend not to. It tanks 1% lows...
While I didn't explicitly test it, I doubt it makes sense because ReBAR is not supported by the Nvidia driver on any current game. One can force it using the Nvidia Inspector but I haven't tried this. Maybe something for an upcoming video :)
No time and due to the lack of driver support for ReBar by Nvidia also probably not much different to my Intel & Nvidia results (but I didn't test it, sorry)
Long time no see....if it no problem for you could you make new OBS studio tutorial for streamimg with Nvidia card AV1 codec for fast FPS games and slow ones ? Tx
To my understanding L3 cache on CPU and GPU are very important for rebar/sam to work properly to boost performance. Your benchmark results are expected. i9 13900k doesn't have L3 cache, rtx 4080 doesn't have L3 cache. This is why I love AMD hardware because they have big L3 caches that is beneficial for gaming.
@@TechGuides yeah I know that too. But what I understand: from dram >> L3 (buffer) >> L2 >> L1 And AMD called them infinity cache which has something to do with smart access memory
What would be a good settings to play with i have a lot of input lag on warzone? I play 1440p with my 3070ti which is 100% bottleneck. I lowered the vram to 50 with low settings but i still feel a delay. V sync is off.
What about using an AMD CPU with an Nvidia GPU? Wouldn't it be the best option? Since AMD CPUs greatly benefit from it, and Nvidia GPUs enable or disable it on each game
I had no more time but because of the lack of driver support for ReBar by Nvidia I wouldn't expect results to be much different from Intel & Nvidia (but I didn't test it, sorry)
@@TechGuides There is a 3rd party app that forces ReBar for Nvidia (as in, it sets to "true" the ReBar for non whitelisted games in the Nvidia driver) the reason for my request is that the results you've shown seems to point to AMD CPUs benefiting more than the actual GPUs, since rebar with Intel CPUs and AMD GPUs didn't show as good of a result. One game I specially noted myself was Wreckfest on my rig, I would get around 30% to 40% improvement by using ReBar/SAM (R7 5700G + RX 6600)
I had no more time but because of the lack of driver support for ReBar by Nvidia I wouldn't expect results to be much different from Intel & Nvidia. But I could do a quick test and maybe post a short. I doubt results will vary much tbh
I’m running i71200H & RTX 3060 on the Nvidia control panel resizable bar doesn’t show for me ! But in the Game File MW3 It says is Enable’ helps pls should I turn it off ?
Thats odd... There is another way to check if rebar is enabled: www.reddit.com/r/Amd/comments/l5jijg/comment/gkvfpy2/? check if it says "large memory range" in your GPU resource tab in the device manager. Still, I would probably try to re-install your GPU drivers
How about testing the 7800X3D with the RTX 4800? An AMD CPU with a Nvidia GPU is the most common set up for gamers. Based in the tests completed it seems the AMD CPU has a bigger impact then the AMD GPU.
you need to make another test in all 4 maps in warzone, you will be surprised. on big map urzikistan BR/zombies you will get fps increase with rebar OFF and increase with rebar ON on smaller maps, i believe this works bad on big map that needs to load. thats why its so good in mw3 cuz they all tiny map.
Gotcha, I've read from a couple of viewers that the results are quite different on big map. I will likely do some tests on my AMD system (rebar in MW3 doesn't appear to be supported by Nvidia GPUs) and make a short about it 👍
The 7800x3d is a better cpu for gaming over all then the 13900k on most games it gets you better performance you should try the 4080 with rebar and the 7800x3d
That doesn't change the fact that Nvidia does not support rebar in pretty much any modern game though.. I know I can force it but I don't think the results would be any different than with the intel chip
On warzone if you have a weak AMD CPU compared to your AMD GPU, you will lose performance. SAM actually eats up CPU performance to provide more GPU performance. This will make a CPU bottleneck.
My 5700X3D + RX 7800XT performs better with SAM off. CPU time with sam off is 4-5ms; SAM on 5-6ms.
GPU time is running at 4-5ms
Thanks for providing an additional data point! Pinned so others will also see this.
Also in MW3 Zombies if you have SAM On, when you look at the middle of the map (Old Town) fps drastically decreases. SAM Off solves that. (Thanks to BeefyTech channel video)
MW3 For 7900 xtx and 5800x3d I get 10% higher 1% lows with SAM off 220 vs 200, but 10% lower average, 300 vs 330.
Does anybody know how to disable SAM for specific game (warzone) because when i go in tuning and global u can disable SAM, , but when u have more games added for different underclocks etc... there is no option for SAM ...
Thanks
On urzikstan with 7800x3d and 7900xtx combo i get FPS drops from 300 to 20-40 every 4-5 seconds, is this bugged?
We need more people like you. I won't trust anyone without providing analysis on TH-cam.
Appreciate it
Would be curious to see the AMD CPU/Nvidia GPU combo to see how similar/different it would be compared to the Intel/AMD combo. Great video overall!
I'd expect there not to be much of a difference to my Intel / Nvidia system but I'll try to test it sometime in the future :)
@@TechGuides There is a huge difference.
@@johnsamuelsii8247 whats the difference? I'm using R5600 with a 3070ti
@@johnsamuelsii8247 source: "trust me bro"
@@TechGuides considering i cant enable AMD SmartAccess Memory (Resizable bar) via AMD Adrenaline software for drivers etc.. yeah, im shocked how i cant find any info on this. I have a 9800x3d and an nvidia GPU.. ReBAR is enabled in bios AND the GPU settings show that REBAR is available but AMD Adrenaline says SAM is "UNSUPPORTED"
I found that when I forced reBAR on my 3080 wirh a Ryzen 7 5800x3D (2k res target), I could get some massive uplifts. The two games that come to mind were 'The Ascent' and 'Shadow of the Tomb Raider'. I used the Nvidia Inspect tool to force it on unsupported games.
But I havent owned that card for more than a year, so I cant remember what other games off the top of my head.
Thank you so much for your videos. I honestly trust your videos more than anyone else’s, simply because of how much you explain. I’m very thankful that you made this your hobby lol
Thank you so much for the kind comment :)
Tbh I only trust your tests as valid source. Other youtubers give as results like "I just prefer this" without any exact testing. Keep up the good work!👍 🙂
This was great. I have AMD CPU and Nvidia 4070 Ti Super GPU. I’ll have to check if Rebar is enabled when I play Starfield.
When I activated Resizable BAR SAM in the game I play, the stuttering was severe. When I activated it, the FPS went up, but that is not important. What is important is how stable and smooth the game is. In particular, The Last of Us Part 1 had severe stuttering. Sometimes, the loading is also slow.
thank you for your detailed videos! hope to see a video about "hardware accelerated gpu scheduling"
Cheers :) Thanks for the suggestion!!
@TechGuides boosting the suggestion on HAGS too!!
Thanks for another great value video! Can you do one for input lag and latency? Theres so many confusing guides on youtube and most of it makes no sense! Keep up the good work legend!
You have my sub. This is some quality content!
Cheers!
Never heard of the RTX 4800
Shh dont tell anyone 🤣
Temu video card
GTX 480
im ..gonna buy . rtx 4800.. 😅😅..
it's the replacement for the ryzen 4070
Love your channel. Videos like this are the only ones worth watching. Finding optimized settings videos where everything is actually tested is difficult to find. Videos that provide dubious claims regarding performance improvements. There's just so much misinformation and garbage tier videos... It just isn't as click-baity unfortunately smh. Keep on going on! ✌
I couldnt agree more! Thank you for the super kind comment ❤️
The whole ReBAR topic became a thing when Intel released ARC gpu’s. And when comparing Intel’s own statement for ARC and this video it is clear the factor of influence is how the GPU and its drivers are made and less about what CPU your system has. It would be nice if Intel or Amd or nVidia would explain the reason why there can be a difference and why sometimes not. I am sure there are engineers out there that can explain it. But i guess the suits of those companies forbid them to explain it in public.
Thank you for testing Counter-Strike 2, is only game i play right now, so big THANK YOU!
amd cpu + nvidia gpu would be interesting
Interesting, I havent considered that a popular setup but now Im also intrigued 😅
I think it's one of the more popular setups. Especially with the older gen Ryzen (5000 series)
@@TechGuides It's one of the most common setups tho. Best CPUs + Best GPUs, the best of both worlds.
Very interesting thank you for making the video and looking into this.
You missed very important pc setup based on amd processor and nvidia gpu, like my rig R7 7800X3d paired with RTX4090
I don't really expect this to perform different than my Intel + Nvidia system but if I have some time I could do some quick tests!
@@TechGuides would be great, thank you
yeap, i cant even enable AMD SAM in their own software, says "unsupported".. have 9800x3d and nvidia GPU as well
Never heard of this. Great explanation.
Wonderful video. My pc is an all AMD machine. I have it enabled in bios and just go from there. So as if it's helping any I couldn't say but knowing I have it on and somesoftware will take advantage of it is fine with me.
Thanks for the analysis
Great technical video! Awesome data 💯
Cheers!
If you have an Nvidia 8GB Vram card, enabling reBar might actually lower your fps since it consistently uses 600MB more Vram at least in Cyberpunk compared to just off, even though there's virtually no performance improvement. However in Vram constraint scenarios it will potentially lower overall fps. So yeah definitely keep it off like you said.
Thank You for the video!
Thank you for watching!
Cool vid and usefull as I have a retro system (Intel + nVidia) but the GPU still uses current drivers and recommends I enable r-bar but the motherboard doesn`t support this and after watching this video I don`t think I`ll worry about it as I was going to do my own testing which yes it seems the issue is more complicated than I realised. 👍
You said "Counterstrike2 ", subscribed for that game.
Awesome, I planned to do a full benchmark of all options for CS2 next week :)
Great job. Thank you!
Muchas gracias por la información. En Warzone con Nvidia recomiendo desactivar REBAR porque genera stuttering y para jugar competitivamente, de hecho, hay que desactivarlo manualmente desde el documento de opciones en tu carpeta de documentos para tener un mejor y más fluido rendimiento.
Great video!
I appreciate the effort, thank you.
My pleasure!
Keep up the guides!
Thanks, will do!
Good analysis and illustrations
Thank you!
I disabled Rebar. Almost zero stutters now compared to before.
So what games?
this channel is way better than Gamer Nexus and Hardware Unboxed lmao
🫶
I think this testing might be more beneficial on systems that are not running games in the hundreds of fps already.
Would be interesting to see this on zen 2 with GTX cards / Amd 5xxx or 6xxx cards
Going from 40 fps to 50 fps could make a game playable that otherwise is borderline. For instance Control has big differences when upping the graphics and there could be a huge benefit there.
I wouldn't expect the percentage differences to be much different on less powerful hardware, so in other words you likely wont be going from 40 to 50FPS (thats a 25% increase) using ReBAR but I didn't explicitly test this
@@TechGuides possibly not, but the Ryzen 3600 was the most purchased CPU so doing testing on that for instance would probably garner a decent amount of views.
Awesome video, would like to ask about this config, an amd based cpu with nvidia gpu, would it potentially perform the same as intel cpu and nvidia system?
Pretty much the same as the Nvidia drivers will still not use rebar in most games.
👍 Keep up the good work! 👍
Thanks, will do!
AMD CPU and Nvidia GPU would be the most popular configuration.
Sorry didnt got round to testing that as well. I might do some quick tests but expect results to be similar to Intel & Nvidia
@@TechGuides Why, though? The other mixed system isn't the same as either the intel + nvidia combo nor the amd + amd system, so why would this one be? It's also, as that poster mentions, a *very* common combo. Surprising that you didn't test it.
Amazing work like you always do bro ❤ What about AMD CPU + Nvidia GPU ?
Thank you 😊 Didnt test it (yet)
the idea is to lower graphics settings until the frame time graph is as stable as it can get. I prefer stabiliy and image quality over fps.
Just a quick thing i discovered today after finally upgrading to a Ryzen 5000 series CPU that supports re-BAR. I needed to also flash my RTX 3080 to latest VBios to get re-BAR support. My RTX 3080 was an older model and i never updated its VBios and was wondering why re-BAR could not be enabled.
Interesting. How do you know which vbios version supports rebar for different gpus?
Great content 👌
Glad you liked it
Thank you! ❤
Really good but your mixed scenario should include both sides not just intel with amd gpu but also amd with nvidia, this four scenarios would concrete the best use case for users that have the amd cpu and nvidia gpu.
Yeah but I didnt have more time to test that as well...
Well let me just say I have the 7950X3D paired with RX7900XTX on ddr5 system memory of 32gb using resizeable bar and I must say ALL my game performance is phenomenal! The intent of that build is to blow away any and all future playstations! Yes I put alot of money into it but with all I can do with this amount of power is ridiculous! Although my setup is major OVERKILL but I wanted to blow the competition out the water!
Yeah basically what I saw on my AMD system too ;)
@@TechGuides i mean amazing performance and have no problems smooth powerful gaming performance! What i don't understand is those who game why do they feel the need to buy a 4090, but sleep on that 7900XTX
I have intel system 14900k and resize bar on helps with 0.1% lows in War-zone
With rebar off 0.1% lows drop more
Keep it on
and what is your gpu ?
SAM does some extra things on top of changing the BAR size. It's been too long so I don't remember anymore but SAM was always a bigger performance improvement than Nvidia's solution. I believe it was also less likely to decrease performance as well but I could be making that up.
That seems to line up well with what I observed. Yes there are additional improvements over the BAR size for sure (also the Nvidia implementation)!
I really never thought that SAM could be affecting my sistem like that, I have an i3 10100F with an RX 6700XT (I know about the bottle neck), and I will make tests to see if the performance reduction is there for me too
Game feels smoother with SAM disabled in the Adrenalin software, but when running benchmarks on MW2 multiplayer results are very similar, SAM off gave 5fps more, which is within the margin of error so I guess I'll leave it off
awesome work!
Thanks a lot!
Good watch. Although I wish you would have used to most common combo of AMD CPU and Nvidia GPU.
I had no more time but because of the lack of driver support for ReBar by Nvidia I wouldn't expect results to be much different from Intel & Nvidia (but I didn't test it, sorry)
@@TechGuides Alright, after all, you did a great job with these. Thank you.
that was insightful and it did explain a lot however in my case I have an amd cpu R5 3600 and an nividia gpu RTX3070 so should I enable RBar on my system or not?!!
Great video, but what about the VRAM usage since it affects how the memory is accessed? Was there an increase or decrease?
From my benchmarks I can see that VRAM usage went slightly up with Rebar enabled
MW3 in the benchmark with 7900 xtx and 5800x3d I get 10% higher 1% lows with SAM off, 220 vs 200, but 10% lower average, 300 vs 330.
The CPU performance is way better better with it off since i dont have the best cpu
@Game Guides
10900k DDR4-4400 & 7900XTX
MW3, low settings, Game Benchmark
At any resolution, with Rebar On, my cpu 1% lows and overall 1% lows drop all they way down to 130fps.
With Rebar Off the 1% lows on cpu and thus overall 1% lows jump to 240 +fps.
Rebar Off seems like the way to go for my system.
Yeah I observed exactly the same behavior on my Intel + AMD system!
Thats because you have an Intel CPU had you bought the 7800X 3D you would of received more gains from your 7900XTX since SAM allows the CPU full access to the GPU memory not just 256MB
Should have tried forcing it on via Nvidia Inspector, in titles that natively don't support it-- more specifically in games that are RAM/VRAM heavy, Think Microsoft Flight Simulator, XPLANE, F1 racing, and Digital Combat Simulator (DCS). These games are all generally pretty RAM/VRAM heavy, especially at higher resolutions/in VR
I have a Ryzen 5600X and and a RTX 3070. I had Resizable Bar enabled without knowing if it really helps or not (I haven't tested it directly). Recenty I had to disable this feature as it completely ruined my fps in Horizon Forbidden West. Without rebar, i have doubled fps and more consistent performance.
with re-bar on my 3080 fortnite fly like angel , and cyberpunk give +10fps ( also less ffps drops )
When I first heard of ReBAR, it sounded an awful lot like when you could plug in a hefty USB drive to offload some of the system RAM activity to it to 'speed up your main processor'. Going from one speed memory to another which, while larger in volume, moves at half the speed of native or far less, will not result in speeding up much of anything. Gaming I equally suspect, it will depend a lot more on both how much system RAM you have and at what speed it runs. If you have a large volume of system RAM but it's lower end DDR4, and a GPU with plenty of DDR6, there won't be much improvement (my working theory going into the next part).
So recently I went from a 5900x with a 3070 to same CPU to a 7900XT. Granted the GPU more than doubling VRAM along with the better processing power made a world of difference, but as my main rig is still fairly old now, having reBAR on in the few games I played actually decreased FPS by about 20-30, title dependant.
Amazing video thanks alot! But didn't you want to add amd cpu+nvidia gpu combo? Would that make any change?
Thanks! I'd expect there not to be much of a difference to my Intel / Nvidia system but I'll try to test it sometime in the future :)
As a full AMD user now i have a wide smile on my face
Yeah AMD definitely has the lead on this one
Thank you.
The only combination that you did not cover is mine, actually😅 I have Ryzen 9700x and 4060 TI 16Gb, so that is AMD/NVIDIA combination. Should I enable it?
No unless you play Marvel Rivals. But even there you have to do a workaround to turn rebar on. The nvidia driver does not support rebar on pretty much any recent game (unless forced) so there is not much point in enabling it.
@@TechGuides Nope, I dont, generally only souls games. Thank you for your answer, wish you all the best with your channel.👌
What about the "Core Isolation" option from Windows defenden in Windows 11? I've heard it's costing people 50 FPS on average if they turn it on. (Memory integrity)
Honestly I dont know about this option. Id be happy to do some research and check if a test would be interesting :)
Not related to the video but ReBAR is a must for intel arc gpu, if there is next gen from team blue.
Next do 😊does a power supply give you higher performance
With the Nvidia system you need to use inspector to enable it in not official supported games. Especially mw3, enable in bios, game config and inspector, redo shaders. Did you do this? Also you should test warzone not the in game benchmark. Measure 0.1% lows you will see the game runs horribly on any system with rebar on. Even though it boosts fps in a gpu bound situation. 0.1% lows are much more important.
With the amd system disabling in the driver doesn't work it needs to be done via bios.
(Bad 0.1% lows talking about mw3 exclusively)
Thanks a lot for watching man! Ah I see, so my results for MW3 on the Nvidia GPU are identical because MW3 not officially supported 🤦♂️ I didn't force ReBAR using the inspector and I also didn't benchmark in Warzone. Guess I will have to specifically test in Warzone on my all-AMD system to observe the 1% low issue. Frankly, I don't think forcing ReBAR using the inspector makes sense...
On My system 7800x3d and 7900xtx i allways get FPS drops every 4-5 sec (with Sam on)
On my i914900k rebar off lowers my 0.1% lows so i keep it on
@@FearNoPlay What GPU do you have? And at which resolution?
In Red dead 2 , Helldivers 2 and Warhammer 40k Darktide i have improvement with ReBar ON
On some games its good on others its not just test it - i have Nvidia Gpu and Amd Cpu
On AMD yes!
In this testing did you just enable default rebar in Nvidia control panel or did you manually go into profile inspect and enable rebar globally for all games?
Nvidia has the option to force rebar for all games regardless, you just need to use the profile inspector to set it as on in the global profile.
Via bios. I didnt feel like enforcing it via the inspector would be great but given the fact none of the games I tested actually support rebar on Nvidia I probably should have.. ah well
I have a Ryzen 7 5700x and rtx 4060(the opposite of your system) should i disable resiable bar? I'm trying to get your opinion on this
I assume ATS/ETS2 are not supported, even though they just updated their game engine?
I mostly play ATS on my 2700x/16GB/GTX 1080ti and lately fps has been getting worst with each game version update to their game engine.
Nice vídeo!
Thank you!
@@TechGuides
I play Apex with Intel+Nvidia and resbar ON 1440p . Today disconnect resbar and test my game.
Sorry,i'm Spanish. My english... XD
Let me know how it feels! Havent had time to check in Apex but would be interested as well :)
Should have paired the Ryzen 4070 with your RTX 4800.
Haha
@@TechGuides Thanks for the content and info.
Nice vid ty
Strange it doesn’t show that Warzone has a rebar but when you go into the Warzone documents and open it with notepad and scroll down you will see rebar true meaning it is activated.
It only works (natively) on AMD GPUs. On Nvidia you can force it using the Nvidia Inspector tool but I would highly recommend not to. It tanks 1% lows...
Thanks.
I have an AMD Ryzen 3800x and nvidia RTX 3080. Is this a combo where I should turn off ReSize Bar ?
While I didn't explicitly test it, I doubt it makes sense because ReBAR is not supported by the Nvidia driver on any current game. One can force it using the Nvidia Inspector but I haven't tried this. Maybe something for an upcoming video :)
I have a i9 12900K paired with 6900XT would I benefit with resize bar off or kept on?
how come no test for amd cpu + nvidia or intel gpu?
No time and due to the lack of driver support for ReBar by Nvidia also probably not much different to my Intel & Nvidia results (but I didn't test it, sorry)
Have you done any research with a Ryzen 7 3700X / Intel Arc A580 GPU?
Not yet but I would be curious too ;)
Thanks, that removed the microfreezes when recording games.
Disabling ReBar?
@@TechGuides Turned on. Even grow up fps in Warhammer 2 and Metro Exodus on my weak 4060ti. 😀
Long time no see....if it no problem for you could you make new OBS studio tutorial for streamimg with Nvidia card AV1 codec for fast FPS games and slow ones ? Tx
To my understanding L3 cache on CPU and GPU are very important for rebar/sam to work properly to boost performance. Your benchmark results are expected. i9 13900k doesn't have L3 cache, rtx 4080 doesn't have L3 cache. This is why I love AMD hardware because they have big L3 caches that is beneficial for gaming.
Not a single resource I found during my research talked about the importance of L3 cache so I'm doubtful
@@TechGuides yeah I know that too. But what I understand: from dram >> L3 (buffer) >> L2 >> L1
And AMD called them infinity cache which has something to do with smart access memory
This is my smiley face for you: 🙂
What would be a good settings to play with i have a lot of input lag on warzone? I play 1440p with my 3070ti which is 100% bottleneck. I lowered the vram to 50 with low settings but i still feel a delay. V sync is off.
Hmm not really much of an idea other than: are you in fullscreen and have nvidia reflex on (not in on + boost!)
@@TechGuides yes fullscreen exclusive with reflex ON. Do you know any good optimization tech who could help me setup my pc and bios?
how does memory latency/bandwidth affect ReBAR?
What about using an AMD CPU with an Nvidia GPU? Wouldn't it be the best option? Since AMD CPUs greatly benefit from it, and Nvidia GPUs enable or disable it on each game
I had no more time but because of the lack of driver support for ReBar by Nvidia I wouldn't expect results to be much different from Intel & Nvidia (but I didn't test it, sorry)
@@TechGuides There is a 3rd party app that forces ReBar for Nvidia (as in, it sets to "true" the ReBar for non whitelisted games in the Nvidia driver) the reason for my request is that the results you've shown seems to point to AMD CPUs benefiting more than the actual GPUs, since rebar with Intel CPUs and AMD GPUs didn't show as good of a result.
One game I specially noted myself was Wreckfest on my rig, I would get around 30% to 40% improvement by using ReBar/SAM (R7 5700G + RX 6600)
Any way you can retest with AMD cpu (i.e. 7800x3d) with your 4080? Like myself (7800x3d + 4090), AMD cpu + nvidia gpu is a common setup
I had no more time but because of the lack of driver support for ReBar by Nvidia I wouldn't expect results to be much different from Intel & Nvidia. But I could do a quick test and maybe post a short. I doubt results will vary much tbh
I'm using an RTX 3080 @4K with ReBAR on.
I knew it didn’t do anything. You’re right all tech channels “turn it on you’ll lose huge fps if you don’t”😂😂😂
I’m running i71200H & RTX 3060 on the Nvidia control panel resizable bar doesn’t show for me ! But in the Game File MW3 It says is Enable’ helps pls should I turn it off ?
good job
8:58 what’s the point to test rebar in simple game that actually can run smoothly on 15 year old pc on even mac/smartphone
hey so I enable resizable BAR but it doesnt say SAM is enabled in my AMD software. Any fixes?
Thats odd... There is another way to check if rebar is enabled: www.reddit.com/r/Amd/comments/l5jijg/comment/gkvfpy2/?
check if it says "large memory range" in your GPU resource tab in the device manager. Still, I would probably try to re-install your GPU drivers
3:49 i love rtx 4800
heh ..love the phrase!
Thak you
How about testing the 7800X3D with the RTX 4800? An AMD CPU with a Nvidia GPU is the most common set up for gamers. Based in the tests completed it seems the AMD CPU has a bigger impact then the AMD GPU.
Nvidia does not actually support rebar on a single modern game (unlike I said in the video) so there is really no point
I’m running 12900k & rtx 3080 & I saw 0 performance improvement on Cyberpunk running graphics driver 555 which is well within the supported listing 😭
you need to make another test in all 4 maps in warzone, you will be surprised.
on big map urzikistan BR/zombies you will get fps increase with rebar OFF and increase with rebar ON on smaller maps, i believe this works bad on big map that needs to load. thats why its so good in mw3 cuz they all tiny map.
Gotcha, I've read from a couple of viewers that the results are quite different on big map. I will likely do some tests on my AMD system (rebar in MW3 doesn't appear to be supported by Nvidia GPUs) and make a short about it 👍
The 7800x3d is a better cpu for gaming over all then the 13900k on most games it gets you better performance you should try the 4080 with rebar and the 7800x3d
That doesn't change the fact that Nvidia does not support rebar in pretty much any modern game though.. I know I can force it but I don't think the results would be any different than with the intel chip