nvme performance

[Jeffrey Walton]

On Fri, Nov 18, 2022 at 8:34 AM Jerry Geis <jerry.geis at gmail.com> wrote:
>
> I have a new motherboard intel based Gigabyte Z790 Elite ZX.
>
> I have a sabrent rocket 4T nvme that is supposed to get 7GB/s read.
> When I run
> dd if=/dev/zero of=tempfile bs=1m count=1024
> I only get 4GB/s. Tested multiple times.
>
> What do I look at as why I'm not getting the higher read ?

Are you on a PCIe x2 slot? x2 achieves 4 GB/s. Maybe you can try on an
x4 slot? x4 can achieve 8 GB/s. And you also need a PCIe 4.0 compliant
board.

Also see https://www.crucial.com/support/articles-faq-ssd/pcie-speeds-limitations
.

Jeff