in a 78F room I hit 80C on the 480 while folding
last weekend I I had the card folding (no SMP too freaking hot in the room) for over 48 hrs and never went over 80c in 78F
I have a 120mm Antec fan on the side intaking directly on the fan on the card
I have two CM Sickleflow 120mm Blues on the back of the hard drive cage intaking from the front under the HD cage blowing on the card
I have a Antec HCG-750w bottom mounted 135mm fan PSU intaking from bottom and a 200mm Antec Big Boy on top exhausting
with Antec Kuhler 620 LC with two Scythe Ultraze 120mm 133cfm 3k rpm fans in push-pull for the CPU
I will be adding two blue Rosewill 120mm to the side soon and eventually add two 120mm to the front grille
this is my case
http://www.antec.com/product.php?id=704505&fid=4&lan=us
sorry to bore you LOL
pretty happy with 80c in a 78f room though
it is a EVGA Superclocked 480 and runs much cooler than I thought from the reviews