I recently bought two Samsung 850 Pro 256GB SSDs in order to replace an old SSD and build a RAID-0 array on my PC. So, the configuration of the PC is the following:
CPU: Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz
Motherboard: MSI Big Bang-XPower (MS-7666)
SATA-II controller: Intel ICH10R (6 ports)
SATA-III controller: Marvell 88SE9128 (2 ports)
Memory: 6x Corsair CMT12GX3M3A2000C9 (total 24 GB) DDR3
GPU: NVIDIA GeForce GTX580 1536MB (EVGA)
I placed the 2 SSDs on the Marvell controller, set mode to AHCI, created the array using the interface provided and then installed Windows 8.1 Pro x64. After installing Windows I ran the CrystalDiskMark benchmark and the results are:
Then I installed Marvell 88SE9128 drivers I found online and run the test again. Here is what I got:
I've searched online for similar benchmarks and mine seems too slow. The sequential read doesn't even reach the 2/3 of the max throughput of SATA 3.0 which is 600MB/s. Also, the rest of the tests are very slow. This is a total dissapointment. Is there something I am missing here (old controller, cable, etc)?
The reason I did not install the drivers during the Windows installation is that the installer could not recognize the drivers which I had copied to a USB flash. I don't know if that affects the raid performance permanently.
Thanks.