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The PCI-E 4 NVMe SSD question again...

Lysrin

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I searched the forum and here were the results I got with the EX920 when new, in my old 4790K system, when I put it in a PCI-e 3.0 riser card. So my write performance is pretty bad on that drive now. Great... another mystery to solve lol

1687373505505.png
 

Bond007

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Nope, don't think so. You can see the selected drive letter in the CrystalDiskMark results, so C: is my HP NVMe SSD. The last CrystalDiskMark is my I: drive, an actual SATA SSD.
Ahh…my bad. Apparently I read wrong when skimming. I took JD’s comment on 500mb/s write as being an nvme drive that was performing per your sata drive results.
 

Lysrin

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Ahh…my bad. Apparently I read wrong when skimming. I took JD’s comment on 500mb/s write as being an nvme drive that was performing per your sata drive results.
No you are kind of right :) JD's comment was about my EX920 NVMe drive. It is only performing at around 500mb/sec writes, and that is much less than it should be and less than the performance I originally had when it was new and running in a PCI-e riser card in my old PC (the last screenshot I posted).

But I don't see any obvious reason for the reduced performance. The health of the drive is good, I don't see anything amiss in the BIOS setup (there isn't much there to change actually), so I'm not sure what is going on. There were performance issues on some SSDs with Windows 11 patches, but those seem to hit both read and write. Not just write like I'm seeing.

Nothing in my motherboard manual that indicates a loss of performance on the PCI-e 3.0 slot now that I've populated the PCI-e 4.0 slot.

I'm at a loss I'm afraid and my Google-Fu isn't yielding much help.
 

JD

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Again, going back to my Gigabyte drive that was the same, you could try doing a forced defrag on it with some 3rd party tool (like old school defrag where it re-arranges the blocks). That seemed to temporarily fix mine. Did many secure erases, even used nvmetool under Linux I believe, couldn't come to any actual fix. Everything would work temporarily at full speed and then it would end up slowing back down.

Doubtful it does much, but the EX920 did have a firmware update long ago: https://www.multipointe.com/downloads-hp-ssd-support/
 

Bond007

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Nothing in my motherboard manual that indicates a loss of performance on the PCI-e 3.0 slot now that I've populated the PCI-e 4.0 slot.

Highly doubt its motherboard related, since the reads aren't limited (slot has the bandwidth available). Something with the drive I suspect, but what that is, I have no clue.
 

Bond007

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And then I got curious and tested the second SN770 1TB (my games drive) that goes through the chipset on my MOB (still gen 4). Minor variance for anyone that cares:

second SN770 1TB.png
 

Lysrin

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I guess none of this is a huge issue. The SN850X is blazing fast and my computer doesn't feel a bit sluggish even on the seemingly gimpy EX920 running my OS.

However it's just the fact that it feels like I'm leaving performance on the table... somewhere... :)
 

Bond007

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I guess none of this is a huge issue. The SN850X is blazing fast and my computer doesn't feel a bit sluggish even on the seemingly gimpy EX920 running my OS.

However it's just the fact that it feels like I'm leaving performance on the table... somewhere... :)
I know what you mean…it would bug me until I swapped (not that that comment helps your cause).
 
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