Samsung 850 EVO Series SSD Review – 120GB and 500GB


CrystalDiskMark & Anvil IOPS

CrystalDiskMark is a small benchmark utility for drives and enables rapid measurement of sequential and random read/write speeds. Note that CDM only supports Native Command Queuing (NCQ) with a queue depth of 32 (as noted) for the last listed benchmark score. This can skew some results in favor of controllers that also do not support NCQ.

CrystalDiskMark 3.0.3 x64 – Intel Z97 Platform

CrystalDiskMark - Samsung 850 EVO 120GB CrystalDiskMark - Samsung 850 EVO 500GB

Benchmark Results: Similar results to that of the AS-SSD benchmark with both the 120GB and 500GB drives scoring almost identically and strong results overall.

CrystalDiskMark Grid - Samsung 850 EVO

There’s a relatively new benchmark called Anvil Storage Utilities that is in beta but close to production. It’s a very powerful tool that measures performance through a variety of tests which can be customized. Since some of the tests more or less duplicate what we get from other benchmarks we use already, we decided to use the IOPS (Input/Output Operations Per Second) testing on 4kb file sizes at a queue depth of 32. IOPS performance is something SSD makers tout quite a bit but we generally don’t do a lot of IOPS testing because frankly a lot of users can’t relate to IOPS metrics as well and it tends to be more meaningful to the enterprise/server crowd. Still, it is another performance indicator with relevance and while some drives post good MB/s numbers, their IOPS scores aren’t always commensurate which this test will prove out.


IOPS Reads - Samsung 850 EVO 120GB IOPS Writes - Samsung 850 EVO 120GB


IOPS Reads - Samsung 850 EVO 500GB IOPS Writes - Samsung 850 EVO 500GB

Benchmark Results: The IOPS performance is roughly equal as well and each do well at high queue depths but at low queue depths, performance drops by about half in writes and about 90% in reads which is huge.

IOPS Chart - Samsung 850 EVO