Samsung SM951 NVMe 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 NBMe 256GB drive topping out at 2265 MB/s read and 1262 MB/s write in the standard overlapped I/O benchmark with a queue depth of 4. Samsung has this drive rated at 2260MB/s read and 1250MB/s write and we are right above on those numbers!

CrystalDiskMark

CrystalDiskMark 3.0.4 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 3.0.4 and 4 RC2 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 NVMe 256GB:

Benchmark Results: The Samsung SM951 512GB M.2 PCIe SSD topped out at 1683MB/s read and 1129MB/s write in the sequential benchmarks and the 4K scores were 57MB/s read and 197MB/s write in CrystalDiskMark 3.0.4. Using the new CrystalDiskMark 4 RC2 we found that the write reading was off again for some reason, but it looked like the read results were okay with a sequential read speed at Q32T1 of 2150MB/s!