Terrible SSD performance, what's causing it?

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dragonstar914

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Jun 24, 2018
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I benchmarked my system today to see the performance of a recent Toshiba 2tb 7,200 HDD replacement for a older slower Seagate 2tb 5,600. On userbenchmark the HDD benchmarked fine but the results on the SSDs were in the one percentile. I downloaded CrystalDisk mark and found the read speeds look okay but that I was getting around 150mb/s random write and 4K writes were in the single digits on my Crucial MX300 M.2 SSD(66% full) and about 150 random writes and in the 40's for 4k's on my 850 evo SATA SSD(87% full). I ran a benchmark with the new 2tb unplugged and got the same. I even reloaded an much older, known good, BIOS save and that didn't help. They both ran fine before, any thoughts on what could be causing it?

Specs:
4790k OCed to 4.65ghz
Asrock Z97m fatality
Gskill TridentZ 2x8gb 2400mhz
Crucial MX300 M.2 525gb SSD
Toshiba DT01ACA200 2TB HDD
Samsung 850 EVO 500gb SSD
MSI Duke GTX 1080ti
MBP750-HM PSU
 
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cryoburner

I was just referring to software that could be used to speed up perceived hard disk performance by using an SSD as a buffer, but you would likely know if you were running something like that, and it seems unlikely that such software could be inadvertently configured the other way around. It's probably something else at fault.
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cryoburner

cryoburner

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Oct 8, 2011
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I found your results here...

http://www.userbenchmark.com/UserRun/10039412

From the look of it, the sequential and 4K random read performance does seem relatively normal for these drives. Write performance is really abnormal though, performing similar to a hard drive.

I don't really know what the cause might be, but have you tried shuffling the connectors around to different SATA ports on your motherboard? I believe one or two of the ports is supposed to get disabled when an M.2 drive is in use, and I was wondering if that might be causing some issue. Otherwise, maybe try clearing your CMOS and manually reconfiguring settings. The only other thing I could think of might be some improperly configured hard drive caching software or something.
 
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dragonstar914

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Jun 24, 2018
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Thanks for your reply. I tried running just the boot drive and just cleared the CMOS but it didn't help. I double checked the shared M.2 ports and those are empty. I am tempted to hook up another SSD I have, test that that and if it is not working right either unhook all the but the spare drive then fresh install windows on that and test. I wonder if something in Windows or on this install is causing the problem.

What so you mean by hard drive cashing software, is there a way to check that?
 
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cryoburner

cryoburner

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Oct 8, 2011
5,753
1,357
34,840

I was just referring to software that could be used to speed up perceived hard disk performance by using an SSD as a buffer, but you would likely know if you were running something like that, and it seems unlikely that such software could be inadvertently configured the other way around. It's probably something else at fault.
 
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