Well, I said I needed one - as my OC'ed Tbred A wasn't enjoying the hot weather.
Before the new heatsink, temps peaked at 65ºC and everaged 60.
Now, it's at 50, crunching seti too.
The heatsink:
Hehe. The fan on it is at about 4.5krpm at the moment - on full it doesn't make much difference.