OK, here's a shot:
Based on what I'm seeing I'm guessing the card in PCI slot 1 isn't getting enough air since the second card is in PCI slot 2. The MB has a PCI slot 3, and I *think* the bios allows me to configure the PCI to have X16 on slots 1 and 3. I'm sure that would help, but I'm not sure I can fit the the second card in slot 3 since there are a lot of MB connectors it would have to sit on top of. I'm guessing this is what you would have me try though, correct?