Well, when I was cleaning my PC the other day, I decided I'd fully clean out my heatsink, do some cleaning, and re-apply arctic silver. The CPU was cemented to the heatsink so it came right out of the socket and I never seemed to get it working again. Can anyone point me out what's the cheapest replacement I can get that won't hurt my performance. I have a 9800GTX arriving Thursday and I sort of don't want to be stuck with my 3700+ when it arrives.

any opteron dual core family CPU, they are mean OCers. Go for the lowest CPU speed and OC it hard.

Lowest I could find on either newegg or tigerdirect
 
http://www.tigerdirect.com/applica [...] P2-OPT-175

I'm going to keep my eye out on the Opteron 165. I really can't spend over $100 because I really don't have much (or any) money at the moment.

you can get a single core 4000+ here for about 40$
 
http://www.newegg.com/Product/Prod [...] 6819103037

I was just about to post that same CPU jrnyfan.
 
Its not bad and it probably will be able to OC a bit as well. But even so your GPU will be bottlenecked a bit or the GPU will be the bottleneck.
 
Good luck with a new CPU though.

more then likely a bent pin,  sometimes you can fix a bent pin if it is not that bad with a mechanical pencil,  insert the bent pin gently into the tip where the lead usally comes out and gentle bend back streight.  

I worry there may be socket or motherboard damage, in which case a new processor won't help.
 
I've got an old single core 3200+ if you're interested.  I'd sell it for dirt cheap.