The test system used in this review was an HP EliteDesk 800 G1. The computer is equipped with an Intel Core i5-2400 CPU, 16GB of DDR3 1333MHz memory, Plextor PX-256M5P 256GB SSD, PNY Quadro K600 1GB PCIe graphics card and Intel 1217-LM gigabit network card. For the operating system, I installed a fresh copy of Windows 8.1 Enterprise.
To test the performance of Toshiba's OCZ RD400 SSD, I ran a series of benchmarks using CrystalDiskMark, HD Tach RW, ATTO Disk Benchmark, AS SSD, HD Tune Pro, Anvil's Storage Utilities, Iometer and PCMark 8. For comparison, I've also included test results from the Samsung 950 PRO, Plextor M6V, Crucial BX200, OCZ Trion 100, Kingston HyperX Savage, Crucial MX200, OCZ Vector 180, Kingston BX100, Samsung 850 EVO M.2, Samsung 850 EVO mSATA, AMD Radeon R7, Silicon Power Slim S80, Samsung SSD 850 EVO, OCZ ARC 100, SanDisk Ultra II, Kingston MX100, SanDisk Extreme Pro and Samsung SSD 850 PRO.
As I mentioned earlier, the RD400 uses Toshiba's TC58NCP070GSB controller chip. While there are a few unexplained dips in the graph, the drive performs equally well with incompressible and compressible data.
CrystalDiskMark 5.0.3:
First, I ran a few quick tests using CrystalDiskMark. This benchmark tool measures the performance of a storage device by testing its sequential read and write speeds as well as its random read and write speeds using blocks 512K and 4K in size.
 Toshiba OCZ RD400 512GB |
 Samsung 950 PRO 512GB |
According to Toshiba, the 512GB RD400 is capable of reading at 2,600 MB/s and writing at 1,600 MB/s. Looking at the screenshot above, you can see that the drive had no problems reaching its rated speed when reading, but came up a bit short in CrystalDiskMark's sequential write speed test.
HD Tach RW 3.0.4.0:
Next, I used HD Tach to test the RD400's read, write and burst speeds as well as its seek times and CPU usage.
Toshiba OCZ RD400 512GB
The RD400's performance was hit and miss when tested with HD Tach. While the drive was able to write at 1,380.4 MB/s, its read speed averaged out at only 899.9 MB/s.
ATTO Disk Benchmark 2.46:
I also used ATTO Disk Benchmark to test the RD400's sequential read and write speeds. The tests are run using blocks ranging in size from 0.5KB to 8192KB and the total length set to 256MB.
 Toshiba OCZ RD400 512GB |
 Samsung 950 PRO 512GB |
When tested with ATTO, the RD400's read speeds topped out at about 2,710 MB/s and its write speeds at 1,632 MB/s.
