Several users of Windows 11 report slowing NVMe performance on various online forums in recent months. The problems seem to be very different, as different discs show different symptoms.
For example, while some NVMe drives experience reduced input/output per second (IOPS) speeds, others experience reduced read/write speeds.enrollments. Performance degradations listed are based on comparisons with Windows 10.
Here is a Publication in the Microsoft forum where the user "MJ_JasonM" writes that the performance of random registration of his SSD has been reduced by almost half, compared to Windows 10.
A Microsoft employee, Neal Christiansen (username Reddit-neochristi), it seems confirmed that Microsoft is investigating the matter in response to a Reddit thread stating slower access times and reduced random registrations:
Greetings, I'm on the systems team files of Microsoft and I am investigating this issue.
The users of Windows 11 have also written several comments about this issue in the Feedback Hub. An interesting comment from commenter Jeff C, suggests that the problem could be related to drivers provided by Microsoft:
Random write speeds are 4 times slower in Win 11 with Samsung NVMe discs
Further testing of all Nvme drives using Microsoft drivers presents the same problem, but the Intel 905P that has its own driver provided by Intel fits the full specifications.
However, these are all assumptions and the problem could be due elsewhere.
There are also a few other comments on the Feedback Hub about their reduced speed NVME.
Random write speeds on Nvme m.2 and ssd 4k have been halved and read time has been tripled in Windows 11.
Low registration performance, IOPS registration and delay
If you're one of the users experiencing a slowdown in NVMe speed, you can add your own comments.
