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Windows 11 causes slow performance on NVMe SSDs • Pureinfotech

  • Windows 11 shows slower NVMe SSD performance than Windows 10.
  • The problem is not new as users have been reporting it for months.
  • Microsoft has not officially confirmed the issue.

Windows 11 There is now an issue causing slow performance for NVMe Solid State Drives (SSDs). According to user reports on Reddit and Microsoft Forums (through the Neowin and XDA), after upgrade from Windows 10 to 11, the performance of the NVME drive can be significantly slower than it was before the upgrade. For example, some users are experiencing lower input/output operations per second (IOPS) and others are seeing slower read/write speeds.

The problem is not new, reports of it have been around for a few months, even when the operating system was still in preview mode, but nothing seems to have changed after Microsoft decided Windows 11 launch on October 5, 2021.

In the Microsoft forum, user “MJ_JasonM” explains his experience and shares screenshots of drive performance on Windows 10 and later after upgrading to Windows 11.

Promote performance comparison
Drive Performance Comparison (Source: Microsoft Forums)

Above Reddit, a Microsoft employee has admitted the company is investigating the issue, but this has been going on for several months without official announcement.

In another thread, user MahtiDruidi on Reddit shared another screenshot showing a noticeably slower write speed on an NVMe drive.

Windows 11 Crystal Report vs. 10
Windows 11 vs 10 Crystal Report (Source: Microsoft)

The root cause of the cause is still unknown as the software giant has not acknowledged this as a problem. However, some users mentioned that the performance issue may lie in virtualization based security (VBS). Others have found that the problem only occurs on the drive containing the Windows 11 installation. For example, if you run the benchmark on a secondary drive, the read and write speeds do not change significantly from Windows 10.

For example, a screenshot was posted in Microsoft Forums shows a significant speed difference on two flagship Samsung 980 Pro NVMe SSDs on the same machine.

Drive recording performance
Drive recording performance (Source: Microsoft Forums)

You can also find similar complaints in the official site Feedback Center. One user confirmed a 1TB Samsung 970 EVO Plus NVMe drive running Windows 10, the popular CrystalDiskMark benchmark tool, reporting random write speeds of around 750-850MB/s. However, on Windows 11, random write speeds are only around 200MB/s on the 970 EVO Plus and 980 PRO. In response to this post, other users reported similar findings when running benchmarks on their devices using NVMe drives.

Microsoft recently released update KB5007262 as a preview for Windows 11 with build number 22000.348, which some user reports showed signs of speed improvement, but it didn’t fix the problem.

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https://pureinfotech.com/windows-11-slow-performance-nvme-ssds/ Windows 11 causes slow performance on NVMe SSDs • Pureinfotech

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