I tested the board when I first built it, using only one of the cards. I actually tested both cards on it once I got it to post the first time. Decided I'd rather check and make sure both cards were working correctly.
Also, like I said in the first post, the system DOES work. It just fails to reboot correctly. I can use it just fine, put it to sleep, wake it up, and shut it down. But when I try to restart it, it shuts windows down, then the display goes black and I get no beep.