The test system used in this review was an HP 8200 Elite. The computer came equipped with an Intel Core i5-2400 CPU, 4GB of DDR3 1333MHz memory, Seagate Barracuda 7200.12 ST3250312AS 250GB SATA 6 Gb/s hard drive, NVIDIA Quadro FX580 512MB PCIe graphics card and an Intel 82579-LM gigabit network card. For the operating system, I installed a fresh copy of Windows 7 Enterprise.
To test the performance of the Plextor PX-256M5Pro Xtreme, I ran a series of benchmarks using CrystalDiskMark 3.0.1, HD Tach RW 3.0.4.0, ATTO Disk Benchmark 2.46, AS SSD, HD Tune Pro 4.61, Anvil's Storage Utilities and Iometer. For comparison, I've also included test results from the Samsung SSD 840 Pro, Kingston SSDNow V300, Silicon Power S70, Plextor PX-256M5P (1.01 and 1.02 Xtreme firmware), OCZ Vertex 4, Kingston HyperX 3K and SanDisk Extreme.
Like the original M5 Pro, the new M5Pro Xtreme is based on Marvel's 88SS9187 controller chip. Looking at the screenshot above, you can see that it performs equally well with both incompressible (0%) and compressible (100%) data.
CrystalDiskMark 3.0.1:
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.
 Plextor PX-256M5Pro Xtreme |
 Samsung SSD 840 Pro 256GB |
According to Plextor, the PX-256M5Pro Xtreme is capable of reading at 540 MB/s and writing at 460 MB/s when connected to a SATA 6 Gb/s port. While the drive performed well, it came up a bit short of these numbers in CrystalDiskMark's sequential read and write speed tests.
 Plextor PX-256M5Pro Xtreme - All 0x00, 0Fill |
 Samsung SSD 840 Pro 256GB - All 0x00, 0Fill |
The PX-256M5Pro Xtreme performed equally well when using highly compressible 0x00 (0 Fill) data. This time around, the drive was able to read at 505.8 MB/s and write at 436.8 MB/s.
HD Tach RW 3.0.4.0:
Next, I used HD Tach to test the PX-256M5Pro Xtreme's read, write and burst speeds as well as its seek times and CPU usage.
Looking at the screenshot above, you can see that the PX-256M5Pro Xtreme had average read and write speeds of 417.2 MB/s and 360.2 MB/s respectively, as well as a burst speed of 339.3 MB/s.
ATTO Disk Benchmark 2.46:
I also used ATTO Disk Benchmark to test the PX-256M5Pro Xtreme'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.
 Plextor PX-256M5Pro Xtreme |
 Samsung SSD 840 Pro 256GB |
When tested with ATTO, the PX-256M5Pro Xtreme's read speeds topped out at about 558 MB/s and its write speeds at 461 MB/s.
