I just picked up a Samsung 840 pro 256GB, and with it a Syba 40054 controller.
http://www.newegg.com/Product/Product.aspx?Item=N82E16816124056
People are in fact getting over 500MBps with this controller, whatever else its problems may be.
Motherboard is a MSI P55M-GD45, native SATA II. PCIe should be 2.
http://us.msi.com/product/mb/P55M-gd45.html#/?div=Basic
OS is XP. Now, the results!
That's 339MB reading, 311MB writing. Pretty...far beneath what the drive is capable of.
Now. This Syba controller card uses a Marvell 88SE92 chip. It seems to say "PCIe x2 2.5Gbps" on boot. It is in a PCIe 16x slot, anyway. 2.5Gbps is 320MBps, but that's a theoretical figure which is exceeded by my lowest benchmark (CrystalDiskMark said 380MB reading, still bad but still far past 2.5Gbps.)
So yeah...not really sure what to do besides "reinstall windows and hold breath." Samsung's Magician is on, ran the optimization...
DXtory's benchmark says it's around 260MBps (this is the program that rated my X25M at 29MBps...).
UPDATE:
I just read about a sinister detail of my motherboard:
http://forums.bit-tech.net/showthread.php?t=214403
Apparently, the other 16x PCIe 2.0 slot becomes a 1.0 slot (in bandwidth) when a graphics card is present! So...if I have this correctly, all is functioning as designed, and the bandwidth is being saturated by the drive. Rats! I had to buy the ugly duckling of microATX chipsets...
http://www.newegg.com/Product/Product.aspx?Item=N82E16816124056
People are in fact getting over 500MBps with this controller, whatever else its problems may be.
Motherboard is a MSI P55M-GD45, native SATA II. PCIe should be 2.
http://us.msi.com/product/mb/P55M-gd45.html#/?div=Basic
OS is XP. Now, the results!
That's 339MB reading, 311MB writing. Pretty...far beneath what the drive is capable of.
Now. This Syba controller card uses a Marvell 88SE92 chip. It seems to say "PCIe x2 2.5Gbps" on boot. It is in a PCIe 16x slot, anyway. 2.5Gbps is 320MBps, but that's a theoretical figure which is exceeded by my lowest benchmark (CrystalDiskMark said 380MB reading, still bad but still far past 2.5Gbps.)
So yeah...not really sure what to do besides "reinstall windows and hold breath." Samsung's Magician is on, ran the optimization...
DXtory's benchmark says it's around 260MBps (this is the program that rated my X25M at 29MBps...).
UPDATE:
I just read about a sinister detail of my motherboard:
http://forums.bit-tech.net/showthread.php?t=214403
Apparently, the other 16x PCIe 2.0 slot becomes a 1.0 slot (in bandwidth) when a graphics card is present! So...if I have this correctly, all is functioning as designed, and the bandwidth is being saturated by the drive. Rats! I had to buy the ugly duckling of microATX chipsets...
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