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I have a HP ENVY Desktop - 795-0017na which I have upgraded with a Samsung 970 EVO Plus 500GB drive, using a Silverstone ECM22 adapater to fit it into a PCIe x4 slot on the motherboard. The motherboard is a HP Berks (HP 844C).

The drive is performing at less than 1/3 of its stated performance - around 850MB/s rather than 3500MB/s.

When I use HWiNFO64 do inspect my system configuration, I see that it reports the drive having a Current Link Width of 1x on the PCI Express bus, when the Maximum Link Width is 4x.

I have a NVidia Geforce GTX 1660 plugged into the 16x slot, but nothing in the other PCIe slots. A factory-supplied SSD is in the main M.2 slot on the motherboard (reported as having a link width of x2).

I have tried disabling the other M.2 slot which contains a WiFi module which I don't use, but that didn't help.

Any ideas what could be wrong?

Samuel Jack
  • 699

1 Answers1

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The answer was to reseat everything (as suggested by Andrew Morton) - I took the adapter out of the PCIe socket, and the NVMe drive out of the adapter, then put everything back again.

Now I'm seeing read and write speeds inline with those advertised.

Samuel Jack
  • 699