990 Pro slow speeds

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18 Apr 2023
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Hi All,

My Samsung 990 PRO 1TB is getting speeds half of what it should, my motherboard is Gigabyte B760M Aorus Elite AX with an i5 13600K CPU

In the bios my drive says : Samsung SSD 990 Pro 1TB NVMe 3.0x4 @ 3.0x4

Am I just missing a setting somewhere to get the full advertised speeds? Thanks.
 
you've got the drive in a pcie3 lane, move to pcie 4

its also possible you have one of those stupid boards where the pcie lanes are shared if they are in gen4 so if your gpu is on gen4 it may be forcing your nvme to gen3
The two slots for the drives are both gen4, I've tried in either slot and still get the same result. No GPU is installed, using the onboard graphics of i5 13600K
 
good shout to check this. Though the mobo and bios manuals are rather poor in explaining which settings to check. OP i would see if there is an online guide or 3rd party help manual.
Thanks, I'll see what I can find. Bit of a nightmare having to faff about with all this, surely it should just be automatic if it was going to work :cry: got a different brand drive arriving today to check also
 
interesting. I'm going to check out my 980s on the back of this. What software were you using? Out of interest what was Samsung magician reporting?
Crystaldiskmark and Samsung magician were both reporting read speeds of 3,300 and bios detecting as gen3.

New WD drive detected in bios as gen4 and read speeds of just under 7,000. No setting changed anywhere so must have been a faulty Samsung 990 pro
 
I guess the last question then is was it a legit item? Presume magician showed the right product? I.e. it wasn't some label switched warehouse return etc?

It's always possible the controller was duff or similar so it could be as you say - a dud. Rotten luck if so.
Everything checked out fine, annoying as I’d always used 970 and 980’s before but this but has put me off them now, happy with the WD
 
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