Should you get an A2 class sd card? Raspberry Pi 4 8GB. A1 Vs A2. Application Performance Class.
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- เผยแพร่เมื่อ 5 มิ.ย. 2020
- Should you get an A2 class sd card? Raspberry Pi 4 8GB. A1 Vs A2 Speed test. Application Performance Class.
It depends on your budget. In my Pi 4 8GB the difference was not significant.
Raspberry Pi 4 8gb
Overclocked to 2147Mhz
Sd card running Raspberry Pi OS
Results
magix A1 16gb sd
Sequential write speed 29574 KB/sec (target 10000) - PASS
Random write speed 847 IOPS (target 500) - PASS
Random read speed 3056 IOPS (target 1500) - PASS
sandisk 64gb A2 extreme
Sequential write speed 32204 KB/sec (target 10000) - PASS
Random write speed 894 IOPS (target 500) - PASS
Random read speed 2077 IOPS (target 1500) - PASS
Kingston A2
Sequential write speed 32251 KB/sec (target 10000) - PASS
Random write speed 1521 IOPS (target 500) - PASS
Random read speed 3621 IOPS (target 1500) - PASS
Amazon links
Magix A1 sd card
16gb
amzn.to/3d9rVry
32gb
amzn.to/36vZlyg
64gb
amzn.to/2AYiGMG
128gb
amzn.to/3eo3eYJ
Sandisk Extreme A2
amzn.to/30gevGE
Kingston A2
amzn.to/2XCkofx
Kingdian SSD
amzn.to/2UxuwEL
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great idea benchmarking ;) I wait for the next one as you said.
SD card Slot Vs USB 3.1 SD card reader. Raspberry Pi 4 8GB. A2 SD Card Speed test.
th-cam.com/video/HT2mxX7TjR0/w-d-xo.html
Thank you, great video, my Kingston cards where just too slow. Ive always had issues with Sandisk so going to try Samsung next I think.
The Card Reader on the Pi can be overclocked by adding this line in the Config.txt
"dtoverlay=sdhost,overclock_50=100"
Interesting video. I like this kind of content. Thanks for showing this information as it's very helpful.
Awesome videos, as always!
I read somewhere you can't take advantage of A2 feature unless you have specific support for it on the device and there is no such support for raspberry pi.
^ this. A2 requires the host support it specifically so A1 is about as good as it gets. I’m surprised the Kingston did as well as it did frankly. Thanks for the comparison video. 😄
@RED DRAGON is that mean that A1 will not support 4k 60 fps ??
@@morganahmed6245Yes, it means if you buy A1 card it shouldn't be able to keep up with 4k/60 fps recordings.
An a2 card would work in my android moto g60?:( Help mee pls;((
@@impoppy9145 Funny answer.
Man! by far you're the best benchmarker of SD cards, and given the fact so ubiquitous they are it's a great service you make to the few of us that try to get the best one for the money.
Great performance from a micro SD card! Raspberry Pi 5
th-cam.com/video/4xwC6vQHKqg/w-d-xo.html
If you could make some bar charts instead of comparing the numbers in a text editor, it would be much easier to understand.
A2 class cards need proper support from both host and drivers, which Raspberry Pi currently doesn't have. I believe I've read somewhere that without proper support an A2 card even performs worse than an A1 card.
If true that would be good to know for certain. Right now it seems that cheap cards really don't hurt you that much.
Sandisk's own sd card reader doesn't even have this support.
Then why Kingston is giving higher scores compared to SanDisk A2
Maybe the sandisk is low because the 64 gb sd is formatted to fat 32 instead of the the original fat64
There is basically no device with the software support that Sandisk is touting for its A2 cards.
Based on your testing, it seems like there are 2 types of A2 cards: the sandisk ones that need proprietary instructions/assistance from the operating system that is not present in 99 % of devices, and real ones where the card can achieve this speed on its own, like the kingston one.
Then why Kingston is giving higher scores compared to SanDisk A2
This article gives a wider comparison.
www.jeffgeerling.com/blog/2019/a2-class-microsd-cards-offer-no-better-performance-raspberry-pi
I've got sandisk 32 A1 and 64 A2 cards, both set for USB boot or regular boot no perceptible difference between them to me as a human whether booting up or gaming usb or sd slot. The cards get hotter in the USB reader. Interested in seeing what you come up with, numbers and hard data wise. 2100 and 775 overclock with fan.
Hey bro I am thinking to buy one card for my phone to store games in so internal space remains unfilled so for games does it make huge difference to open up in A2 vs A1
@@AleccSaar Phones really aren't going to use the speed of a faster card.
These were the results from my testing of Sandisk Pro A1 and A2.
kB/sec (Write) IOPS (Write) IOPS (Read)
Reference 10000 500 1500
Sandisk Extreme Pro 32 A1 RPi3 17347 837 1847
Sandisk Extreme Pro 32 A1 RPi4-8 36430 1072 2422
Sandisk Extreme Pro 64 A2 RPi3 17165 811 1897
Sandisk Extreme Pro 64 A2 RPi4-8 36620 931 2469
Sandisk Ultra Fit 16 USB3.0-USB2 RPi3 19686 713 1208
Sandisk Ultra Fit 16 USB3.0-USB3 RPi4-8 34008 730 1358
The A2 is slight faster on the IOPS read and kb/s write but loose alot on IOPS write.
Both were brand new. Standard operating procedure were identical. The only difference is that the A2 were 64gb and the A1 were 32gb.
So really, A2 is a bad choice at least if we're speaking about Sandisk.
you need to do the test minimum 3-5 times to get a proper test result. because you have to remember the power usage.. also need to make sure CPU usage is same on all.
Does the A2 class card have some benefit if are frequently flashing the card on Windows with a USB 3 adapter? I.e. you wont see any benefit on the PI but you will see the benefit for example if you are updating an PI Alpha OS on a regular basis? I.e. RGB-PI OS4 Alpha
A2 cards are generally faster in the Pi. I don’t know if they are more durable. SSD drives are faster and more hard wearing
Hey, I just got one of the Sandisk 64GB Extreme A2 cards last week. These are the results from a raspberry pi 4 with 4GB of ram not 8.
Sequential write speed 38035 KB/sec (target 10000) - PASS
Random write speed 1083 IOPS (target 500) - PASS
Random read speed 2850 IOPS (target 1500) - PASS
I also got this same sd card and tested it twice on my RPi 4 4GB version.
Sequential write speed 37120 KB/sec
Random write speed 935 IOPS
Random read speed 2526 IOPS
I wonder why my results are lower. Maybe it's just a lottery how good of a card you get (like with cpu's).
(I tested on the 16th January 2021)
The sd card reader it's bottlenecking your sd cards probably
Good review
Here are my speed test results on an 8gb pi 4, the Canvas go! is a great well priced card, the cheaper Select plus less so
Kingston Canvas Go! Plus 64gb A2 - Pass
Sequential write speed 32363 KB/sec (target 10000) - PASS
Random write speed 1436 IOPS (target 500) - PASS
Random read speed 3807 IOPS (target 1500) - PASS
Kingston Select Plus 32gb A1 - Fail (best result after 6 runs)
Sequential write speed 14602 KB/sec (target 10000) - PASS
Random write speed 823 IOPS (target 500) - PASS
Random read speed 1209 IOPS (target 1500) - FAIL
v30 v60 v90 is far more important those are minimun sustained write speed
can tell me what the maximum memory card size for the raspberry pi 4 8gb is.
before it was 32GB.
What's up to GB now
The biggest I use is 128gb. Any larger and the cost jumps up. Better off with an ssd for performance and reliability.
Is the A2 or A1 better for cellphones? I download more music than videos or movies or games.
It doesn’t matter for music
@@leepspvideo Thanks for the information 👍👍👍👍👍👍🙏
I got better speeds on my 32GB Samsung Evo Plus on fresh install '2020-12-02-raspios-buster-armhf' after system settles down:
Sequential write speed 25540 KB/sec (target 10000) - PASS
Random write speed 1007 IOPS (target 500) - PASS
Random read speed 3649 IOPS (target 1500) - PASS
(the best result I could achieve)
32GB is a A1 card
Have you tried any of the 512G cards? Thank you.
No bigger than 128.
leepspvideo Thank you.
Has anyone tried Kingston Canvas Go! Plus 64gb in Raspberry Pi 3B? If so, is it as good as in RPi4?
Okay, I just checked this micro sd card on RPi3B and got the following results.
Sequential write speed 17621 KB/sec (target 10000) - PASS
Random write speed 1012 IOPS (target 500) - PASS
Random read speed 2281 IOPS (target 1500) - PASS
Which is not that great, but still Okay
Time to re do that test for RPI 5 😏
I have done some
Raspberry Pi 5 Vs Pi 4. micro sd speed tests
th-cam.com/video/DcyCrUv-MLw/w-d-xo.html
Of course because A2 is best girl.
Possibly, your Sandisk card is just a good fake. I also had amazon and fake SD cards.
Maybe repeat tests five times and average results. You never know if OS is writing something in time of test etc.
Maybe you will find that results are so random that you can't even say that one card is better from five tests. Maybe they will be consistent. But with one test, you can't know.
On top of that on RPI3 USB bandwidth is shared between network, disk, wifi, peripherals (at least I think so) and this likely won't change with RPI4, it's optimized for price, not for performance.
Moot point! Most power users will be booting for out SSD drive. Good bye micro SD card RIP.