i agree with anotherguy. make sure it's a brisbane though. plus the 3600's overclock very well. usually get up to high 2ghz range, often hitting 3ghz, which puts them somewhere around an e6600~e6700~x2 6000. all for $65. actually, you can use the same heatsink you're using now (although if it's a crappy aluminum chunk you may wanna upgrade that too...but still...cheap!). regardless, you should actually buy the oem version because i believe the 3600's stock heatsinks are the same aluminum chunks. oem was like $60 when I bought mine a few weeks back at the egg, free shipping.