As for those large coolers like that, I use the Thermalright Venomous-X and on the Gigabyte UD7 board there
wasn't enough room to attach 2 fans to it with how tall my RAM is. On the Maximus IV there is just enough
room to attach the second fan but, to be honest I'm not sure I notice much of a cooling difference. I've always
been told a push/pull setup can actually hurt cooling performance and that you should really just strap a single
fan on there with a high CFM.