[dRweEz]

Ran into the same issue on Saturday, MIVE with 2600k @ 54*104. All the rear USB ports died but the front still worked. About 10 min later the board died completely. Clearing the bios did nothing and when powering up the board it would just power down.

Fearing condensation issues, stripped the rig down and the board went into the oven for 5min @ 80 Deg. After letting it cool down for a little while put the pot back on and everything was back to "normal" for the rest of the session.

My Rampage III Extreme after about 4 hours at -100 or more would act the same. My best guess is that some of the components get a to cold when the art eraser freezes through.