As for ASUS,The Crosshair V Formula Z and Rev 2 and Rev 3 Sabertooths do support the 220Watt Cpu,And it is not just the cooling,the board has to be able to with stand the CPU's power draw of 220 watts.,the VRM's especially .
"The real kicker is the 220W TDP reportedly attached to both chips. AMD's top Vishera-based CPU, the FX-8350, has a TDP of only 125W. The step up to 220W is huge, and I have to wonder just how many Socket AM3+ motherboards can even deliver that much power reliably"