I forgot to mention I don't need a gaming rig. Just run basic programs simultaneously like Word, Firefox, Excel, & Adobe Reader, etc.
Your main issue with your current pc is RAM/ memory . You have 1 gig installed . If you can find a 2 x1 gig kit of DDR2 cheaply that will cure the lagging problem you are having
Ah, ok. What about the gpu? Isn't it too hot? Will video still be choppy with new ram? Also, you don't think I should just upgrade the mobo to get ddr3 ram? Is there a big difference between ddr3 and ddr2? Would the newer cpu make a difference for what I'm doing?
Upgrading cpu/mb/ram is a better option . It also costs more which is why I mentioned the other option .
DDR2 vs DDR3 makes no speed difference to a computer , but having 4 gig instead of 1 certainly will .
And so will having a quad core processor which will multitask much better