So I don't want to upgrade for a bit. However, the graphics card that came with this computer is not so good. I'd like to upgrade the graphics card while I wait to build a new system. I was thinking NVIDIA 6200 or 6600 (GT??). I can get these cheap and they seem like a great upgrade.
The main question:
What is the best card I could get without worrying too much about a CPU bottleneck???
How do I know if the card will fit in my box?
Will it require a power supply or coolant upgrade?
Good news that you have an AGP card to upgrade unlike people with integrated graphics and no AGP or PCI-e slot.
What is you budget? I would say a 6800GS or X800GTO would be about the highest I'd go. The 6600GT is pretty decent, but for the money I'd rather have a X1600pro, which is usually cheaper even. It would offer a huge increase over what you have for a reasonable price. It's also a pretty feature rich little card.
If you are in the US, here are some good AGP prices.
As far as your box size and PS. Is your case a low profile one needing a half height video card? I hope not. List your power supply specs which should be printed on the Power supplies label inside the case.
For an Athlon XP go no further than a 6600GT otherwise the CPU will bottleneck.
Well keep in mind that your rig probably isn't brand new. If you game, i'd rather get a cheap mobo+cheap CPU+memory. You can get all those bellow 250$(Athlon 64,AS Rock Sata 2 mobo and value PC3200). And once you have money get a gfx card.(BTW, remember,that mobo supports PCIe only so untill then you'll have to do with integrated)
Decent rigs are cheap these days. 8)