I know that there is some gforces out there that can be. I don't recommend it though, but if any, look for one that has pci written after the products name. They will tell you if it is PCI or AGP. There is a significant diffrence between the two. Here is a PCI
card. Down at the bottom, the gold part where you connect it to the motherboard pci slot, is the big diffrence between the two. The agp has key cuts in its connector in diffrent places. Here is an AGP
card. The AGP also has a hook at the end to fit in the AGP slot nice and snug. I know this is probably more than you asked for, but it's always good to know. PNY I know makes PCI cards for nvidia, as I had one. I know that there is a lot more companies out that make them. For performance purposes, the PCI can only go so far. That's where the AGP takes it's place, and thats why more people choose AGP. Also, the AGP slot performs better, regardless. Here is a good pci card.