How to Switch to Steam OS Main Channel | Update BIOS | Downgrade | Overclock APU of Steam Deck LCD

Steam Deck Undervolt & Overclock APU Guide . UMA Buffer Size set to 4gb . Using Recommended Settings of Cryoutilities v2 . Swap File Size set to 16gb . Video recorded using Poco F5. Ambient Temperature : 34 degree Celsius .
Timestamp :
- BIOS Update : 00:00
- Updating BIOS / Steam OS : 00:39
- Downgrading Steam OS : 02:35
- Overclocking the CPU & GPU : 03:15
- Performance Summary : 05:17
- GTA IV Settings : 05:42
- Gameplay with OC : 06:03
- Resident Evil 2 Settings : 07:04
- Gameplay with OC : 07:30
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[@alejandrochang9400]

Brother you are the G.O.A.T itself. Thank youuu!! My steam deck it’s flying!!! That’s how it’s meant to be played for real!!

[@Ludecan]

Nice!! Haha, believe it or not, my main Steam Deck game is currently GZDoom, which is totally CPU single core bound, so a nice 1 core overclock could help within the same TDP. I'll be testing this out! But when it becomes stable.

[@Ludecan]

If I get this right, the BIOS changes increase the maximum clock the CPU/GPU can go to, as long as thermals and power limits are not exceeded right?

[@GamingDJ4u]

That game may show good results with only a cpu overclock. Indian Summer season here so the temps were high, I think that's why I couldn't get the cpu to overclock. Not sure what valve's thermal limit is, max apu tdp is still limited to 15watts so temper your expectations.

[@Ludecan]

@@GamingDJ4u yeah, that makes sense. I'll let you know when I check it out

[@dannyd4339]

Dude same. My main game even on pc is gzdoom. So fun, so many possibilities and mods.

[@Ludecan]

@@dannyd4339 yeah right? What are you playing now? I'm trying to complete a run of Brutal Doom Platinum + Eviternity on UV and hells those wads are hard. But almost there, I'm at level 23 now.
Also I tried the overclocking the other day and got the same results as you @GamingDJ4u. It never raised clocks past the default 3.5/1.6 so it seems tdp is the limiting factor.
What did improve is the undervolting though, with the previous bios I could only go to -40/-40/-40 but I read someone on reddit mention that smokeless uv was more stable than bios uv so I tried if this new bios improved thins and yes, it allowed me to go to -50 on al three, so there's that.

[@kevinkev1530]

👍🏾

[@Sickem96]

I would be interesting to see CPU overclock on CPU bounded games. For example horizon FW has shuttering problems caused by CPU 🤔

[@GamingDJ4u]

Cpu oc didn't work for me in any game that I tried , I think it's due to the high temps. Apu max tdp is still limited to 15watts so can't expect much.

[@TakumiJoyconBoyz]

@@GamingDJ4u Can't you use PowerTools to exceed 15w and improve the temps by disabling the updated fan control?

[@GamingDJ4u]

You can use third party methods, need to downgrade the bios as well. I don't remember it much now, look it up on TH-cam. Won't work directly using power tools. However if you have steam deck lcd variant, I wouldn't recommend going over 15 watts profile. Already heats up a lot during summer season.

[@vonbrendt01]

so if I want to overclock my steam deck. Is it safer to just wait for the stable version?

[@GamingDJ4u]

No, bios has nothing to do with steam os version, you can even downgrade steam os after updating to the latest bios. Bios update will persist.

[@coachnutt61]

Is that for LCD or OLED? I heard it was only for OLED!

[@GamingDJ4u]

Released a few days ago for the lcd variant

[@Venom55704]

Any news related to gfn coming in india?

[@GamingDJ4u]

No

[@crowland3358]

Hi please tell me os this running both underclock and overclock at the same time ?

[@GamingDJ4u]

Undervolt and overclock at the same time. Only gpu overclock worked for me though.

[@crowland3358]

@@GamingDJ4u thank you I will give this a try as this build is now on preview.

[@GamingDJ4u]

@@crowland3358 you can switch back to stable steam os after updating the bios. Bios won't get downgraded.

[@dontsweatme4588]

Any reason why my cpu won’t overclock when I’m in game ?

[@GamingDJ4u]

Couldn't get it working as well

[@user-ed4yp6eq5k]

U need more power to get the most our of the oc