I ran mine for a couple days in my 102-104F mining room. Clocked at 750mhz the temps were in the low 80C's. I've since moved it to sitting on top of my water heater with a heat pump (see my post above) just to reuse the heat to heat the water. Temps are now in the low 60C's, plus I get about 2000 extra Sols/s with the cooler temps.

I don't think anyone really knows what the correct chip temps are. There is a lot of talk these chips being more like GPUs or FPGAs. Most people try to keep their GPUs below 75C, but temps into the high 80C's are not really an issue. In case anyone asks, my temps of my gpus are 55C - 65C.