Autotune gave me 816 while it was still in the case. I agree, the temps at which these throttle vary widely from unit to unit. Without a thermometer I'm unsure of my ambient temp. With the windows open this morning, I noticed my single was running cooler so I tried the 864 firmware and learned that about 45C (or 45.5) seems to be the trigger on that one. Here's a shot taken just before (or while) it throttled:
http://imageshack.us/a/img705/2486/cgminer.jpgIt appears n4l3hp is about right; tests on my single show throttle-trigger-temps of:
832 firmware - about 48C
864 firmware - about 45.5C
872 firmware - about 43C
