Samsung SM951 512GB M.2 PCIe SSD Review


ATTO & CrystalDiskMark Benchmarks

ATTO v2.47

ATTO is one of the oldest drive benchmarks still being used today and is still very relevant in the SSD world. ATTO measures transfers across a specific volume length. It measures raw transfer rates for both reads and writes and places the data into graphs that can be very easily interpreted. The test was run with the default runs of 0.5KB through 8192KB transfer sizes with the total length being 256MB.

Samsung SM951 512GB:


Benchmark Results: ATTO showed the Samsung SM951 512GB drive topping out at 2259 MB/s read and 1583 MB/s write in the standard overlapped I/O benchmark with a queue depth of 4. The HyperX Predator Black 480GB PCIe SSD that we reviewed last month hit 1429 MB/s read and 1001MB/s write, so this drive is in a league of its own!


Benchmark Results: Setting ATTO to a Queue Depth of 6 didn’t really help performance as we hit a wall at 2265 MB/s read and 1591 MB/s write in the overlapped I/O test.


CrystalDiskMark 4 Beta1 x64 – Intel X99 Platform

CrystalDiskMark is a small benchmark utility for drives and enables rapid measurement of sequential and random read/write speeds. We are using CDM 4 Beta 1 that supports Native Command Queuing (NCQ) and an adjustable queue depth, but we left the queue depth at 32 so you can compare your drive at home without having to make advanced setting changes.

Samsung SM951 512GB:


Benchmark Results: The Samsung SM951 512GB M.2 PCIe SSD topped out at 2259MB/s read and 1547MB/s write in the sequential benchmarks and the 4K scores were 513MB/s read and 425MB/s write with a QD of 32.