This thread:Extreme Undercooling got me to wondering what my CPU could do, so I tried running with no heatsink much like that guy.

Opteron 146 CABYE
DFI NF4 UT Ultra-D 702-1
Patriot XBLK 2x512

I backed the CPU off to 5x200, and set my Startup voltage to 1.2v (to aid in cold boots), and then set the VID override to 0.9v. Removed the HSF and rebooted! I have a 80mm case fan blowing directly over the CPU, as you will see in the video's.

Here are some (slightly crappy) video's of the CPU doing its thing, and me poking around on the PC doing benchmarks and the such. CPU temp is Temp1 on top (temp1 on bottom is HD). Movies are split into 4 parts, since my digicam wouldnt record longer than 170 seconds or so.
Part1
Part2
part3
part4
(no audio, and in XVID format, hosted by me on DSL 640Kbit upstream)

30 minute heatsinkless prime95 run:


and SS after i halted the run:


Temp curve for going from Idle (95*F) to fully loaded for 10+minutes (118*F).


SS after getting done with a UT2003 run:


These opterons run cold as ice, when on low voltage! Thanks for the suggestions of running with no-HSF!

More later...

-Plack

Online Temperature converter

XVID video codec