Just ordered a 4850 and 2.6ghz Core2 so hopefully I can at least get a few more FPS out of it and perhaps move the draw distance sliders up a bit too, although judging by Flameduck's PC it seems to a complete lottery as to whether your PC spec makes any difference to the way it runs.
I assume that HD4870x2 means you have them in whatever the ATI-equivalent to SLI is? Does GTA support that? because it doesn't support SLI.
I assume that HD4870x2 means you have them in whatever the ATI-equivalent to SLI is? Does GTA support that? because it doesn't support SLI.