AM2 or 939 ?
:x You have to post something more specific to what you are trying to ask us. You cannot just post 10 worded Thread and expect University lectures to follow upon your 10 words of an "upgrade" question.
Telling us your socket, your budget, your expectations on what you want(single or dual core) what will you use it for(why you want to upgrade). :roll: What rude people we have on these forums lately, and you wonder why we're(the regular forum users) getting mad at you.
All you do is game but what kind of games?? If you play old generation games then your current CPU is already overkill. Games do not usually take advantage of CPU upgrades, they take advantage of GPU upgrades.
I recommend a ATI X1950XTX or 8800GTS if you really want to see "Oomph" in games.
Wait for the ATI R600 Graphic Cards. Buy 2 of them on a Crossfire setup(if your motherboard supports it) and you'll see improvements (like having the high school hottie as a girlfriend and upgrading to Carmen Electra + Pamela Anderson 3-Some)