Long story short:
I was at work, We were using Dry Ice to keep some stuff cold, And there was allot left. I took a couple pounds home, Played with it for a bit, Then just "Went for it" and plopped a piece on my Thermalright XP-90:
After One minute, CPU temp 8C full load:
After Two minutes, CPU temp below 0C full load. I had a screen of Abit sotware reading 0c, But this was awhile ago:
the frost buildup was too unnerving, So I turned off the computer:
The Leftover piece of dry ice:
^Notice the other piece laying ontop of the now frost-covered box cutter knife, Lol.
This got me thinking- What about placing the entire motherboard on a flat piece of dry ice, And then more on the heatsinks, Etc. Kind of a "Poor Man's Dry ice Benching" for those of us without pots.
Anyways, It was fun.