I've discovered that the stock Corsair fans are actually optimized for their H2O coolers, so I'll probably keep them. I'm mounting this in a Antec 900 case with two front fans that I'll turn around for pulling. Hope to gain the 4-5 degrees I've heard about in forums and reviews. If not I'll be "topped out" at 1.7Ghz due to temps. Running mid-70's at times now!