I built my steam box this Christmas using an MSI z97 gaming motherboard, i5 4460, MSI 280 twin frozr, 8gb corsair vengeance, and all in an RVZ01. I installed the retail cooler at first, and then upgraded to a Zalman CPSN 2X. Checking the temps in the BiOS it's idling at 60 degrees, so I re-apply the thermal paste and try again with the same result. Today I've tried a Noctua NH-L9I, and installed two aero cool 120mm fans, one above and one below leaving one of the silverstone fans in the bottom of the case. Result? 61 degrees.
All bios settings are out of the box.
Ready to quit, seriously.