|Yeah, for whatever reason, S939 dual core CPUs are extremely expensive. But if you have a decent board, you should be able to overclock the 3000+ & buy yourself a little time. 2.25GHz *should* be possible IF you have the right board.|
As for your system being slow...make sure you don't have a lot of garbage loading at startup & sucking up the resources. You should have very few icons in the system tray...audio, antivirus, firewall & network are the only ones that are necessary. And if you don't have a cleaner such as CCleaner-slim or Glary Utilities-slim, get one & use it daily.
How to use MSCONFIG in Windows XP to disable some of the unnecessary programs that automatically load on start-up
"My budget is about 150-200"
That's actually enough for a decent AMD AM2+/AM3 budget build. I was gonna jump on the following board myself but it sold out too quickly:
ECS 780G/SB750 motherboard - $55 after rebate
Here's another possibilty:
ASRock 780G/SB710 motherboard - $70
4GB (2 x 2GB) DDR2-1066 - $50
AMD X2 7750 Kuma black edition - $65