I'm using a measly ATI Radeon 7200 VIVO w/ 64 megs DDR.
It's holding up very well, and I just finished up a session where I scored several kills, and was sniping guys off the top of a tower at long range.
Graphically, well, what can I say? I'm not very demanding there, as long as things look like what they should look like, and I can tell what they are, I am happy. And Planetside is making me happy
There are several things that I can't figure out yet, and I'm going to have to spend some time learning how to play now that I have blown things up.