Would the 6870 run on a 600W PSU? Which would be better, XFX or Saphhire. The twin frozr looks a bit out of my budget range.
What is the PSU maker? Link please? Some PSUs say they can support 600w, but are really a 250w PSU. If it is Corsair, XFX, Antec, Seasonic, a new OCZ, or PC power and cooling, then you should be just fine.