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Samsung 980 PRO PCIe 4.0 NVMe SSD Linux Performance

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  • #31
    Anyone here aware of any benchmarks comparing pcie4 and pice3 ssd drives on pcie3 motherboards? I want a new SSD before I upgrade my motherboard/CPU combo and am wondering if future-proofing is a good idea or if I should just stick with a pcie3 drive and possibly buy a pcie4 drive later -- or even just keep the pcie3 drive.

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    • #32
      Originally posted by cthart View Post
      Anyone here aware of any benchmarks comparing pcie4 and pice3 ssd drives on pcie3 motherboards? I want a new SSD before I upgrade my motherboard/CPU combo and am wondering if future-proofing is a good idea or if I should just stick with a pcie3 drive and possibly buy a pcie4 drive later -- or even just keep the pcie3 drive.
      If you have a PCIe 3 board get a PCIe 3 NVMe unless you plan on upgrading soon. The sad truth is that NVMe storage keeps getting crappier and crappier as they try to squeeze more bits out of basically the same hardware. There is a premium for PCIe 4 cards that can be a little difficult to justify with the current cards.

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      • #33
        Originally posted by onlyLinuxLuvUBack View Post

        Maybe you should try to read the datasheet fine print...
        when you exceed the io window of the intelligent cache you will run in their 2nd listed performance mode.
        That is absolutely correct, but again this has no relation to the "LBA range" whatsoever. You can write to any LBAs you like and your writes will hit the SLC cache if it is not overwhelmed.

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        • #34
          Originally posted by Michael View Post

          Guessing there are some firmware woes with the 980 PRO under Linux but haven't yet seen anything to confirm that.
          Hey Michael.

          As a premium subscriber, is there any chance I can ask you to do a quick re-benchmark of the 980 Pro with the new firmware released a few days ago (see reddit, new firmware is apparently 2B2QGXA7)? I'm quite curious to see if it fixes the anomalously bad performance you encountered in this article.
          Last edited by intelfx; 27 February 2021, 10:24 AM.

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          • #35
            Originally posted by intelfx View Post

            Hey Michael.

            As a premium subscriber, is there any chance I can ask you to do a quick re-benchmark of the 980 Pro with the new firmware released a few days ago (see reddit, new firmware is apparently 2B2QGXA7)? I'm quite curious to see if it fixes the anomalously bad performance you encountered in this article.
            It doesn't. I've updated the firmware, write speeds terribly slow.

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            • #36
              Interestingly, there's a Linux benchmark tool - KDiskMart - which takes on the specifics of testing SSDs. It gives much different results, which correspond better to the claimed performance of 980 Pro. Wondering if really the test suits used here, as well as Gnome Disks benchmark, or hdparm really are relevant to the modern SSDs?

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