Well, I have a Thermalright HR-03 (non-gt version) installed for my gfx card and it is one of the top best air cooler for a gfx card. BUT it is huge and it takes a lot of space. It lowered my temps from the stock cooler by a large margin. My card is clocked 650gpu/1000mem and idled at 50 degrees centigrade, and 70+ when playing Crysis on all high (with very high tweaks, thx tweakguide.com). Now it idles at 39, and 56 when loaded. I use a Vantec pci slot card fan (so the cooling is not optimal, noisy little fellow too) at the lowest fan speed and my room temperature is kept at about 25ish. I use a pci card fan because the HR-03 is so big that it just narrowly misses touching my aftermarket northbridge cooler (HR-05 SLI

) and it makes mounting a fan cumbersome. So I recommend you take a look at the HR-03.