I just got the Leadtek 4400 and it is truly an amazing performer. I have two 120mm L1A's blowing on top of it and two sucking the hot air out of the top, and it runs at a silky smooth 306/695 (I haven't pushed it any higher...yet). I believe the extra cool air blowing on it does help, especially on the Leadtek due to it's cooling process (it seems as if it sucks the heat into heatsink and away from the GPU--what it is supposed to do mind you). Anyways, I love it. Go Leadtek!