Samsung SSD 850 EVO mSATA and M.2 Drives Reviewed
Test Setup, IOMeter 1.1 RC
Our Test Methodologies: Under each test condition, the Solid State Drives tested here were installed as secondary volumes in our testbed, with a separate drive used for the OS and benchmark installations. Out testbed's motherboard was updated with the latest BIOS available as of press time and AHCI (or RAID) mode was enabled. The SSDs were secure erased prior to testing, and left blank without partitions for some tests, while others required them to be partitioned and formatted, as is the case with our ATTO, PCMark 7, and CrystalDiskMark benchmark tests. Windows firewall, automatic updates and screen savers were all disabled before testing. In all test runs, we rebooted the system, ensured all temp and prefetch data was purged, and waited several minutes for drive activity to settle and for the system to reach an idle state before invoking a test.
Video Card -
Intel Core i7-4790K
MSI Z97 Gaming 7
(Z97 Chipset, AHCI Enabled)
Intel HD 4600
8GB G.SKILL DDR3-1600
Integrated on board
Corsair Force GT (OS Drive)
Crucial M550 (256GB)
Samsung SSD 850 Pro (1TB)
Samsung SSD 850 EVO 2.5" (500GB)
OCZ Vector 180 (480GB)
Samsung SSD 850 EVO M.2 (500GB)
Samsung SSD 850 EVO mSATA (1TBGB)
Chipset Drivers -
Video Drivers -
Windows 8.1 Pro x64
Intel 10.0.26, iRST 22.214.171.1242
Intel HD 10.18.10.33
IOMeter 1.1.0 RC
HD Tune v5.50
CrystalDiskMark v3.0.3 x64
SiSoftware Sandra 2014
As we've noted in previous SSD articles, though IOMeter is clearly a well-respected industry standard drive benchmark, we're not completely comfortable with it for testing SSDs. The fact of the matter is, though our actual results with IOMeter appear to scale properly, it is debatable whether or not certain access patterns, as they are presented to and measured on an SSD, actually provide a valid example of real-world performance for the average end user. That said, we do think IOMeter is a reliable gauge for relative available throughput within a given storage solution. In addition there are certain higher-end workloads you can place on a drive with IOMeter, that you can't with most other storage benchmark tools available currently.
In the following tables, we're showing two sets of access patterns; our custom Workstation pattern, with an 8K transfer size, 80% reads (20% writes) and 80% random (20% sequential) access and a 4K access pattern with a 4K transfer size, comprised of 67% reads (34% writes) and 100% random access.
These new Samsung SSD 850 EVO mSATA and M.2 drives performed right in line with their 2.5" counterparts, which is to say they performed very well and neared the top of the charts.
The overall bandwidth numbers show where the new Samsung drives fall in terms of transfer rates. To reiterate, the drive put up some excellent numbers and trailed only the more expensive SSD 850 Pro.