im getting a new GPU simply cuz mine ( Nvidia FX 5500 ) is horrible, so im getting a X1600 Pro, and im wondering will this improve my framerate or is framerate a mixture of RAM, CPU, and GPU? Thanks!
The video card will definitely give you a big boost, but your system is only as fast as the slowest component. Ie, a really fast video card can still be bottlenecked by a crappy CPU.
If your building a new one within the next couple months, I'd wait on upgrading anything. It'll make it easiler to buy the part you want.
Meaning that if Dell has AGP video and you buy a AGP card, then build a new one with PCIe, Then you won't be able to use the one you just bought. You'll still have to buy a video card either way, but at least not buying now will let you have more money for something more powerful later.
Same with RAM, DDR now, vs needing DDR2 later. (unless it's a relatively new Dell and uses DDR2)