Okay first thing first is your homework
study this guide to OCing a Phenom II
http://www.overclockers.com/forums/showthread.php?t=596023
just the guide
not all 100 posts LOL
after that if you are already not familiar with your BIOS settings then get familiar with your BIOS
OCIng a Phenom non-BE takes some work.
tricky because when you raise your reference clock alot of other settings get raised
also download CInebench 11.5,Prime95,HWinfo,Intel BUrn Test which are all free programs. google them and they are easy to find
if you have a 64 bit OS then get the 64 bit versions
PM me when you are ready
you should be able to get about a 500mhz or more increase on that 920 pretty easily and that makes a big difference with these Phenoms