Our Test Methods: Under each test condition, the SSDs 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 at the time of publication and AHCI mode was enabled for the host drive.
The SSDs were secure erased prior to testing (when applicable), and left blank without partitions for some tests, while others required them to be partitioned and formatted, as is the case with the ATTO, PCMark, and CrystalDiskMark tests. Windows firewall, automatic updates, and screen savers were all disabled before testing and Windows 10
Quiet Hours were enabled. In all test runs, we rebooted the system, ensured all temp and prefetch data was purged, waited several minutes for drive activity to settle, and for the system to reach an idle state before invoking a test. Also note that all of the drives featured here were tested with their own NVMe drivers installed where possible / available -- not the default Windows 10 NVMe driver.
|HotHardware Test System
|Intel Core i7 and SSD Powered
Video Card -
|Intel Core i7-8700K
Gigabyte Z370 Ultra Gaming
(Z370 Chipset, AHCI Enabled)
Intel HD 630
16GB G.SKILL DDR4-2666
Integrated on board
Corsair Force GT (OS Drive)
Intel Optane SSD 800p (118GB)
Samsung SSD 960 Pro (1TB)
OCZ RD400 (1TB)
WD Black NVMe (1TB)
Samsung SSD 970 EVO (1TB)
Samsung SSD 970 PRO (512GB)
Chipset Drivers -
|Windows 10 Pro x64
Intel 10.1.1.45, iRST 188.8.131.526
HD Tune v5.70
CrystalDiskMark v6.0.0 x64
PCMark Storage Bench 2.0
|I/O Subsystem Measurement Tool
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 results with IOMeter appear to scale, 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. The access patterns we tested may not reflect your particular workload, for example. That said, we do think IOMeter is a reliable gauge for relative available throughput with 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; a custom Workstation pattern, with an 8K transfer size, consisting of 80% reads (20% writes) and 80% random (20% sequential) access and a 4K access pattern with a 4K transfer size, comprised of 67% reads (33% writes) and 100% random access. Queue depths from 1 to 32 were tested, though keep in mind, most consumer workloads usually reside at low queue depths...
The Samsung SSD 970 Pro and 970 EVO consistently finished towards the head on the pack with both access patterns and at all queue depths we tested. The Intel Optane 800P has a distinct advantage at QD1, but once the queue depth increases, the Samsung
drives pull ahead, especially with the 8K / 80 / 80 pattern which incorporate some sequential transfers into the mix.
If we focus on available bandwidth and latency -- again, at QD1 -- the Intel Optane
SSD 800P shows its strength and offers the highest bandwidth with the lowest latency. The new Samsung drives notch in right behind it, with the WD Black NVMe right alongside.
|AS SSD Compression Benchmark
|Bring Your Translator: http://bit.ly/aRx11n
Next up we ran the Compression Benchmark built-into AS SSD, an SSD specific benchmark being developed by Alex Intelligent Software. This test is interesting because it uses a mix of compressible and non-compressible data and outputs both Read and Write throughput of the drive. We only graphed a small fraction of the data (1% compressible, 50% compressible, and 100% compressible), but the trend is representative of the benchmark’s complete results.
The compressibility of data being transferred across the Samsung SSD 970 Pro and 970 EVO has very little impact on performance. The drives put up some of the highest numbers of the group in the read test, but trailed the WD Black NVMe in the write test.