Hey everyone,
got my cards back the other day. Just (as in an an hour or so ago) got my 2nd card installed again into my computer.
It seems to be working fine.
They said that there was a problem with the coolers on the card and that they were overheating. Not sure how this is possible since OverDrive said they were at 42-4C and 30C respectively. If the cards overheat at those temps than I think Sapphire needs to go back to the drawing board...
Whatever the reason the new/refurb cards they send me back seem to be working great. As always, I won't be shy to repost here if the problem persists (though if it happens again I may just buy a new motherboard).
Cheers!
and thanks for all your help,
Jack