Temperatures, and power-draw
[graph 1729][graph 1730]
[graph 1730]
NVIDIA's reference cooler has always been good at getting rid of heat, and the one on the Inno3D card is no exception.
Power-draw
[graph 1725]
[graph 1726]
Another area in which the GTX 275 wins over the HD 4890s is with respect to idle power-draw, which is around 25W lower than RV790. Every little helps.