Got two S939 systems that I'll I'll be handing down, and just wanting a heads-up on what Graphics card upgrades I should aim at in the near future, as these will now be more aimed at gaming than anything else.

Systems: Corsair 520W, Asus A8N32-SLi Deluxe, 2GB G.Skill ZX, each, AMD 64 X2 4800+ in one, and Opteron 180 in the other. They've each got a Leadtek WinFast 7950 GT 256MB card. Not sought to overclock the systems in anyway, but expect there would be a bit of a need now, if they're to stand a better chance of handling the newer games. I'm aiming to eventually output to at least a 19" monitor.

What would be a good upgrade, without going over the top, because of the limitations of the rest of the system?

Cheers.

i'd go for a 4670 with those kind of specced machines.

something like this would be a nice upgrade without going over the top - http://www.overclockers.co.uk/showproduct.php?prodid=GX-184-SP&groupid=701&catid=56&subcat=1274

They should handle anything upto a ATI4850, 5750, nVidia 9800GT or GTS250 without too major a bottleneck tho your going to see some lower fps than a faster CPU, you'd deffinatly not see the full benefit of any faster GPU than those.

Thanks guys.