Last year I built an AM5 PC with x670e board and installed 2x gen4 ssds and 1 gen3 from different OEMs.
Today I installed another gen4 and ran benchmark on all drives. To my surprise all the old ssds read speed is down by 30-60% from last result, write speed is similar to specs. I am unable to figure out what is wrong with them all drives are showing 98-99% of spare.
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Do the slots share lanes?
If you remove the last drive and try again is it any faster?
What’s the make and model of the things?
WD Black SN770 (down to ~3300 mb/s) Crucial P3 (most affected) Sabrent R4 (least affected)
None of these drives are problem drives iirc… if anything, how full are the drives percentagewise?
WD is boot drive and remaining are for storing AAA titles. They gets full but I uninstall games after completing it but most of the time they are filled to 70-80%.
I’ve noticed that performance starts slowing down when you get near full on these drives sometimes.
My motherboard has two M.2 slots, but they share a PCIE gen3 lane.
If I put SSDs in both, and they are both NVME, (I could put a sata SSD in one of them) they both drop down to gen2 speeds as the lane gets bifurcated in order for both slots to work at the same time.
In my case, my mother board manual actually DOESN’T mention this, so I had to find out the hard way when I plonked in a second drive. I did check when I bought the mobo because I knew this is common, but oh well.
Which os are you running?
Try to partition it with free space at the end and see if it makes a difference.
Try to trim the drive and see if it speeds up again.
Do you use any disk encryption?
