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:

Windows Insider program | Windows Insider preview | Performance and maintenance

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

60 answers

Sort by: Oldest
Most helpful Newest Oldest
  1. Anonymous
    2021-08-30T18:28:37+00:00

    Okay here's mine :

    Windows 10 21H1 With All Cumulative updates 👇 and On Samsung 970 Evo Plus NVMe M.2 1tb SSD Primary OS Drive.

    Windows 11 Same Drive, Beta Build 22000.168 👇

    Looks Like RND4K Q32T16 Is Considerably slower in Write Speed than 10 was.

    Was this answer helpful?

    0 comments
  2. Anonymous
    2021-08-30T19:31:39+00:00

    Yes, you are definitely seeing a slowdown on the Random Wites. 2116 to 471MBs, using a direct motherboard m.2 alot on a desktop PC motherboard.

    Since only my Asus laptop has m.2 NVMe, that is why my random write speeds had topped out around 850 on Win 10. With build .168 I've seen it go as high at 720-740 but also as low as 300. So something still isn't right.

    Was this answer helpful?

    1 person found this answer helpful.
    0 comments
  3. Anonymous
    2021-08-30T19:32:45+00:00

    I'd also suggest doing a new report in the Feedback hub and attach the pictures.

    Was this answer helpful?

    0 comments
  4. Anonymous
    2021-08-30T21:10:23+00:00

    Yes, you are definitely seeing a slowdown on the Random Wites. 2116 to 471MBs, using a direct motherboard m.2 alot on a desktop PC motherboard.

    Since only my Asus laptop has m.2 NVMe, that is why my random write speeds had topped out around 850 on Win 10. With build .168 I've seen it go as high at 720-740 but also as low as 300. So something still isn't right.

    __________________________________________________________________

      I've found the same thing with fluctuating Write Speeds. Sometimes it's way up, and other days, it's lagging like in the Clip for Win 11 today.  I also went over to the feedback hub to see how things are going on this matter and to my surprise there are quite a few posts over there now on this matter.

    Was this answer helpful?

    0 comments
  5. Anonymous
    2021-08-30T23:40:04+00:00

    I haven't checked the feedback hub since .160. I'll have to see what other posts are now listed.

    Was this answer helpful?

    0 comments