Yeah so that one board is still bad. Keeps shutting itself off even if I downclock it so the onboard temps are only 30-40C. I guess I'll have to talk to dave about RMAing it. This happens no matter what slot it's in.
if you are mixing capacitor and no-capacitor boards, try putting ones with caps behind those without. In theory, this may have a stabilizing effect on the bank depending just how the m-board circuit is laid out. Of course a bad board is a possibility too, but they are very simply designed so there are not many failure modes available (bad chip, broken component, bad solder, etc)
make sure heatsinks are on the backside of the PCB, and put a heatsink on the thermal vias opposite the small volatge regulator. putting a heatsink on the inductor may help as well, as these components are both near thier capable limits at 30A across cards doing >35GH. keeping thier temp down may help
