General Random Write disk speed degradation in Windows 11.

Anonymous
2021-08-23T04:42:53+00:00

After updating several machines from Windows 10 to Windows 11 users have noticed a significant degradation on Disk Random Write speed. This is quite noticeable with NVMe SSDs benchmarks, it also seems to affect SATA SSDs even if it is not as significant. See 3 samples below with 3 different devices on Windows 10 and Windows 11:

Windows 10 19043.1165 NVMe SSD SK Hynix:

Windows 11 22000.160 NVMe SSD SK Hynix:

Windows 10 19043.1165 SATA SSD ADATA SU800:

Windows 11 22000.160 SATA SSD ADATA SU800:

Windows 10 19043.1165 Samsung NVMe SSD MZVLW:

Windows 11 22000.160 Samsung NVMe SSD MZVLW:

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  1. Anonymous
    2021-10-25T17:58:50+00:00

    I'm also hitting this on latest W11 + Samsung 980 Pro, Ryzen system. Downgrading to W10 fixes it.

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  2. Anonymous
    2021-10-18T06:53:21+00:00

    Having same issue with 5950x and 1TB Evo 980 NVMe.

    Could it be related to the issues some AMD CPU's currently have with Windows 11 perhaps - Underperforming i think due to cache issues?

    @GmanYO,

    I have Intel Processors and the the NVMe write speed is still a problem.

    I don't think MS fixed any of those issues yet.

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  3. Anonymous
    2021-10-18T06:42:44+00:00

    Having same issue with 5950x and 1TB Evo 980 NVMe.

    Could it be related to the issues some AMD CPU's currently have with Windows 11 perhaps - Underperforming i think due to cache issues?

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  4. Anonymous
    2021-09-04T21:19:54+00:00

    @Syue87,

    Hi there,

    Please submit a report on Feed Back Hub, with the snapshots of Win 11 versus Win 10 results.

    There is no reply from MS yet.

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  5. Anonymous
    2021-09-04T20:56:15+00:00

    I'm having the same issue. I have two 1T Samsung 980 Pro's in my system with X570 + 5950X. The system drive (top image) uses the PCIE lane from the CPU, the D drive (bottom image) uses the chipset lane. The performance of the D drive is unaffected, but write IOPS and write Q32T16 of the C drive is much slower. The windows 11 is a fresh install from the ISO, reinstalling windows 10 resolves the problem, so it's not caused by the disk.

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