Well I've got the Panaflo installed and I think my top exhaust fans might be "short circuiting" the air flow through my Megahalems somehow. I'm going to pickup some aluminum ducting tape today and try closing off the sides of the heatsink. Then I'm going to take a serious look at fabricating a duct to direct most of the air from the Megahalems toward the rear exhaust.

Oh yeah, while I was at it, I moved my EAH4890 to the bottom most PCI-E 2.0 x16 slot. Talk about a pain...