Microsoft has recently released the update KB5007262 as a preview for Windows 11 that bumps the version number to build 22000.348, which some user reports have shown signs of speed improvements, but it doesn’t fix the problem. In response to this post, other users reported similar findings when running benchmarks on their devices using NVMe drives. However, on Windows 11, the random write speeds are only around 200MB/s on the 970 EVO Plus and 980 PRO.
One user confirmed its 1TB Samsung 970 EVO Plus NVMe drive running Windows 10, the popular CrystalDiskMark benchmark tool, reports random write speeds around 750-850MB/s. The in-place drive is a WD Red 4TB and it works well now. You can also find similar complaints in the official Feedback Hub. Here is the info on the system and the new drive is a Samsung 870EVO SATA 2.5' 4TB drive. Drive writes performance (Source: Microsoft forums) For instance, if you run a benchmark on a secondary drive, the reads and writes speeds do not change significantly compared to Windows 10.įor example, a screenshot was posted in the Microsoft forums showing a significant difference in speeds on two top-of-the-line Samsung 980 Pro NVMe SSDs on the same machine. Others have discovered that the issue only happens on the drive that contains the Windows 11 installation. However, some users have mentioned that the performance issue could lie in the virtualization-based security (VBS).
The root of the cause is still unknown since the software giant hasn’t acknowledged this as a problem. In another thread, user MahtiDruidi on Reddit shared another screenshot showing noticeable slower write speeds on NVMe drives. On Reddit, a Microsoft employee has acknowledged the company investigating the issue, but this happened several months without an official follow-up. Drive performance comparison (Source: Microsoft forums)
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