Question WD Black SN750 1TB Slow write speed

Jan 15, 2020
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Hello.

I installed a new WD Black SN750 1TB on my desktop. And I checked the speed.

The result is below. I think max speed is fine, but 4KiB is very slow especially write speed. I don't know what is the problem.

The SSD is installed on Gigabyte AB350 Gaming 3(Ryzen 5 1600X) and I installed another 3 SSDs on motherboard.

[Benchmark picture]
 
Jan 15, 2020
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Thank you for your reply. I didn't think about testing on safe mode.
I have tested on safe mode.
Seq Q32T1(Read/Write) 3456 / 3016
4KiB Q8T8(Read/Write) 1617 / 1555
4KiB Q32T1(Read/Write) 376/338
4KiB Q1T1(Read/Write) 53/199
On safe mode, the 4KiB write speed appears about two times faster than normal windows mode. So, is this caused by my windows system? And are these speeds normal?
 

Maxxify

Distinguished
Aug 12, 2007
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Your safe mode results are what you should be getting all the time, yeah. It means software of some sort - an application or driver - is interfering with 4K writes. An example would be a backup agent (e.g. Acronis), Anti-Virus, things along those lines.
 

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