I dunno, Quake II here makes a pretty playable game. I really don't think a 7 year old PC could touch it.
I wouldn't go as far as saying that, I've got a P200 thats at least 7 years old that can play Unreal/Quake II in high res and high detail with little or no framing. Mind you the only reason I can do that is because the machine is running dual voodoo II's.