It is hard to say if the 3DMark error is due to a
BIOS issue. Have you tried using 3DMark05/06 or Vantage?
Which drivers are you using CAT8.8? Does the error occur with a single card?
The
BIOS that works best for me so far is 725, though i am confused as to why you need to rebuild your array if as Praz mentions there are no updates to the
RAID ROM.
When using
RAID i usually spring for a separate controller, incase the board fails but that is irrelevant given your situation.
Why not try to resolve the 3DMark issue before building the array. When you are sure it is dealt with then use the
RAID afterwards.