Sapphire HD 4850 X2 Review
 

One of my biggest issues with high performance is the high levels of
heat generated and that often means loud cooling. I'm completely surprised
by how well the HD 4850 X2 cools itself, I was skeptical that the two tiny
heatsinks would be able to do the trick, especially when there's probably
more metal on the shroud than with the heatsink. However, with the latest
BIOS flashed onto the card, Sapphire has managed to balance performance,
heat and cooling noise. I was still able to achieve a modest overclock while
staying at reasonable temperatures and quiet cooling. http://www.overclockersonline.net/in...icles&num=2151