Windows 11 only has 45% of random write speed in Nvme SSD

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https://answers.microsoft.com/en-us/windows/forum/all/windows-11-only-has-45-of-random-write-speed-in/4de7b84f-5d43-4eb1-9036-f8d3b8f36837

As you see above, the other performance is about the same, but in RND 4K Q32 T16 the speed has dropped significantly. I know that because the two software versions are different and the condition of the computer is different, it is normal for the performance to fluctuate, but this performance also dropped too much, and the performance remained stable low after many tests at different times…

https://www.ghacks.net/2021/12/07/windows-11-is-reportedly-slowing-down-some-ssds/

..Another theory rules out the possibility of VBS (Virtualization Based Security) affecting the performance, since the option was disabled before taking the benchmark. Some users have claimed that disabling the option has improved their system’s speed, you can optionally try it by going to Windows Security > Device Security > Core Isolation, and toggle the setting for Memory Integrity. You may also want to turn off the Animation Effects under the Accessibility options in the Settings app…

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Cybertooth

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Microsoft released KB5007262 preview to fix drives slowdown.

..Addresses an issue that affects the performance of all disks (NVMe, SSD, hardisk) on Windows 11 by performing unnecessary actions each time a write operation occurs. This issue occurs only when the NTFS USN journal is enabled. Note, the USN journal is always enabled on the C: disk…

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