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Samsung SM951 NVMe M.2 PCIe 256GB SSD Review

By: Jon Coulter | PCIe in Storage | Posted: Jun 10, 2015 2:09 pm
TweakTown Rating: 96%Manufacturer: Samsung



Version and / or Patch Used: 3.0 Technical Preview


CrystalDiskMark is disk benchmark software that allows us to benchmark 4k and 4k queue depths with accuracy. Note: Crystal Disk Mark 3.0 Technical Preview was used for these tests since it offers the ability to measure native command queuing at QD4.






Let's focus on 4K QD1 and 4K QD4 because they are the two most important categories. The SM951 NVMe is again breaking lab records. Nothing that has come across our bench is even close to the SM951 NVMe. The SM951 AHCI drive is able to deliver the second best performance.




Our Seagate 600 Pro array massively outperforms the PCIe drives at 4K QD1. Normally we consider this an important indicator of a drive/arrays performance, but we have come to find that this only applies to SATA-based SSD's.





Version and / or Patch Used: 1.7.4739.38088


AS SSD determines the performance of Solid-State Drives (SSD). The tool contains four synthetic as well as three practice tests. The synthetic tests are to determine the sequential and random read and write performance of the SSD.






What the chart does not show, the screenshot does. 54 MB/s at QD1 read is another lab record. With our synthetic testing out of the way, let's get to some real-world testing and see how Samsung's SM951 drives really perform.

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