I Just put a HR03 Gt on a Evga 8800gt Non OC version...here are my results

This is with a 120mm Thermaltake blue led fan 75cfm on top..I also mounted the heatsink where the fan blows on the back of the card..Didnot woant to loose any pci's

Stock fan 100%
Idle 49c Load 75c(crysis)

Hro3
Idle 33c Load 47c(crysis)

Very impressed with this. Easy install..