Samsung 950 PRO Low Random (Read/Write) Performance

dcmarchbank

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Dec 29, 2015
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Here's the speeds I'm getting guys:

Specs:
Windows 10 Pro 64-bit
Asus X99-A
i7-5820k
16GB G Skill Ripjaws 4
GTX 660Ti
Asus Xonar DX

Info:
It's my main OS drive, only 18% storage utilization.
Currently using Samsung NVMe Driver (1.4.7.16)
BIOS Mode is UEFI (Version 2001)
PCIEX16_4 Link Speed (Gen3)


I've tried resetting CMOS and installed a clean OS, anyone got any ideas?
 

dcmarchbank

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Dec 29, 2015
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Yeah my SATA is set to AHCI, though I believe the software interface I am utilizing is NVMe via M.2.
 

dcmarchbank

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Dec 29, 2015
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After a complete reformat of my SSD I get these speeds:

I'm really not sure what is wrong with my Random Reads though?
 

Palorim12

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May 3, 2013
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ppl with half Random Read with the 950 PRO.

I spoke to Samsung today about the speed and they informed me that the Magician benchmark tool, only benches with a single thread for Random, thing is, a single thread caps at about 200,000k IOPS.

They are going to be updating the benchmark tool, but to see the correct benchmarks, for now they said to use Crystal Disk Mark, newest version. Go to the settings drop down, select Queues and Threads, and in there, make sure Random is set to 32 Queues and 4 threads, like in the below picture.



Then you bench and it will give you the full speed on Random Read.



my Random Read is 1116MB/s.

To convert that to IOPS, you do

(1116 / 4) * 1024

279 * 1024

285,696 IOPS
 

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