This is the system I just built, I mainly Play World of Warcraft and Star Trek Online, I am home bound so I spend a lot of hours on my computer
Rosewill Blackbone Black Steel / Plastic ATX Mid Tower Kingwin Mach 1 Modular Power Supply - 700-Watt, ATX, SLI-Ready, Quad 12V Rails ASUS Rampage II Extreme LGA 1366 Intel X58 ATX Intel Motherboard Intel Core i7 920 2.66 Corsair Core i7 Dominator 6GB PC12800 DDR3 RAM Corsair CWCH50-1 Hydro H50 CPU Liquid Cooler Windows 7 Home Premium Western Digital WD3200AAKS Caviar Blue Hard Drive - 3.5", 320GB, 7200rpm, 16MB, SATA-300, OEM for my OS Drive Western Digital WD5001AALS Caviar Black Hard Drive - 500GB, 7200 rpm, 32MB, SATA-3G for my Games Drive
I am currently using 2 PNY nVidia 9600 GT 512MB SLi'd Video cards
What would the best video card for this system to allow me to use graphics at their highest setting with the best results.
More aboutgaming video card system
The cards you have now should max both of those games. If it isnt, the best performance/price ratio is currently the 5850. WHich will easily max out both of those games.
What resolution do you play at? As that is the main deciding factor for a GPU.
It can handle the current best non-enterprise graphic card, the HD5970 with no problems at all.
HD5970 is the best, but HD5850 has the best bang for the buck as "truhls" said.