I have an old PC with a 250w PSU and an AGPx4 slot.
What is the best possible card I can use on this system for gaming?
More aboutgraphics card update
You'd probably need to upgrade the PSU anyways. The best card is the HD4650 AGP (I think theres now a 4670 AGP, not sure). But I think it needs 8x AGP. You get the HD3650, HD 3850. But it still needs external power. What is your system specs?
I have: Pentium 4 2.8 HT Radeon 9600xt 2GB RAM
Is it possible to get an external power supply? I have a Shuttle computer, hence the small PSU.