newest bios diatros, for both the controller and your board. if you are using the evga x58 that is a perfect board i used the same one
*hint* play with the pci-e packets on that board (they are enabled by latest bios) you will get great returns putting it at around 1048 and bump up your ioh vcore a lil bit and watch that fly!!!

which classified do you have?? if it is e759 try these settings to maximize raid goodness!

PCI-E 1048
IOH vcore 1.3
IOH/ICH 1.625
ICH VCORE 1.125
NF200 1.325

there will be some variance of course, but that wil point you in the right direction