I too am having 9650 troubles though setting the bios on the card to performance did help. It still doesnt perform anywhere near where it should.
I cannot seem to get more than 120 mb/s STR on my raid array of raptors. And the funny thing is hdtach shows a flat graph. Now I know you will realize that's just at the pci bandwidth limit but I am using the motherboard sata ports. The pc consists of:
DFI nf4 sli expert Venus, 2 gb ram, opteron 170 @ 2.76 ghz. I ran a battery of tests and the drives are ok, the cables are ok.
To spare bandwidth I would kindly ask you to peruse my data already posted here:
I dont know if it's rude to point to threads posted elsewhere so forgive me if it's against forum rules.