I have 2 80 mm below and above the back power supply and the power supply fan itself has a fan.
I also have a 120mm and a 80mm in the front.
You need some good cooling if yer overclocking and this is one badass cooling rig.
its like a friggin tornado in there but everythings very cool.
Usually below room temperature or the same as.
More cooling the better.
Can't stress that enough
My gladiac would only overclock to 365 memory before now with good cooling im at 385 memory and going to try higher.