I had to heat up the heatsink on my Voodoo to get it off, the freezer trick didn't work. I looped 3DMark for a couple of hours, then tried with a screwdriver and cd. Once it started to come off, I put it back in the system and ran 3Dmark for another half hour, because the glue had cooled down. After I had taken it out the second time, I went at it with the screw driver again, and after 2 mins of careful prying, it popped off. I think the heatsink I have on it now is a little overkill, but it looks cool.