I currently use this on my NB and it works great. I have ordered a MCW30 waterblock to take its place so I can overclock further. My BadAxe2 has heatsinks on the mosfets and they seem to do fine. If you can also have a fan blowing on them it would help. I left the stock heatsink on my SB.

http://www.swiftnets.com/


"MCX159-CU series Chipset Heatsinks for AMD® & Intel® platform motherboards"