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Samsung 980 Pro low IOPS on random writes

nexusmera

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I am using Samsung 980 Pro 1 TB, which I bought 8 months ago, in Windows 11 system, both write and read IOPS values are shown as 1 million on its own site, but I get 250 thousand IOPS value in writing while there is no problem in reading. There is no problem in temperature values. There is no problem in the speed test in MB/s, I can get the promised speeds, but there is a problem with the IOPS value.
My SSD drive is up to date.

It has nothing to do with Windows 11 because when I test with my other SSD WD SN570 500 GB on the same system, I get 400k IOPS in random writes.

Is this something that can be solved or is there a problem with the SSD?

Motherboard: MSI B650 Gaming Plus WiFi
 

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However, I don't understand one thing... Did you buy this SSD to use as a boot drive, or to do benchmarks? You say yourself that it works well and you achieve the promised speeds, I don't really see a problem. Just use it for its intended purpose and move on with your life. Samsung surely will not take back that drive! IOPS say nothing in real life, you won't see it even, and many of them are photo-shopped or use an special program with caching to have higher IOPS.

And with all your benchmark's you are shortening it's life, because of the many write operations that have no use. Even more in real life using it for games or Windows these random writes with many gig's will NEVER happen, so why would you care about that? But, it's your money you are wasting at moment.

I did buy my SSD to use them for what they are made for, NOT for benchmarks... We now have ultra fast drives and yet we begin to benchmark them again as with everything. Many people have a computer for benchmarks only, i use my computer for what it's made for. You will have a different outcome on other computer's anyway.

How much IOPS you achieve depends on many things, too many to mention.
 
Last edited:
Is this something that can be solved or is there a problem with the SSD?
Merhaba ve foruma hoş geldiniz,
The values promised by the manufacturer in the data sheet are virtually the best values that can hardly be achieved, especially with IOPs -> often only 80-90% of the best values can be achieved on a conventional system. The achievable values here often depend on the processor - 16-core CPUs in particular achieve higher results here (because CDM uses 16 threads!), but also energy-saving settings play a role - a Max-Perf profile would usually achieve better results in all 4K benchmarks than "balanced". And in general: an OS SSD ALWAYS achieves fewer IOPs in benchmarks than a non-OS SSD, as Windows is always doing some shit in the background.
As for your screenshots specifically:
1,09 Mio IOPs in read = very good result for 980Pro (I have several 980Pros and was usually just under a million IOPs), 263K IOPs in writes on the other side is very low - looks like Win11 22H2 bug, that was fixed a while ago. Please update your Windows11 first. My 980Pro @ Win11 as OS-SSD (before updates):
1738259035641.png
1280 MB/s = 312.675 IOPs
Typical values as non-OS-SSD on the same System:
1738259165576.png
same as IOPs:
1738259344295.png

And now as Win11-OS-SSD after all patches and updates:
1738259455060.png
3790 MB/s = 925K IOPs and 2754 MB/s = 672K IOPs (more than double compared to before!)
 
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