I posted a thread a couple of days ago, but I realized that I wasn't asking the right questions. So I'm going to start over with this new thread, I hope you don't mind.
I want to upgrade my slow unstable computer to a pretty good gaming computer. I already have a case, CD-Drive, Floppy Drive, 1 80GB WD HDD, 1 9GB WD HDD, Sound Card. I want to replace my: Motherboard, Processor, Ram, Video card, and PSU. My budget is under $500. My goal is to have a computer capable of playing next-gen games, and be able to play current-gen games on medium-high settings.
If you could recommend any products or a computer build that would be awesome.
Also, if you can explain the benefits of Dual-Core vs Single-core and DDR vs DDR2 in a gaming PC.