Well..... welcome to the forums! How big of a cooler do you have on it now?> If you could i would spend $20 on a thermaltake volcano 7- and after unlocking one of my duron 850- i was able to do 1125 (something like that over 1.1gig-) For unlocking all that you need it a pencil or try
www.tomshardware.com for a guide-
Spyder