I hear that a Hailea (1/2 hp) HC 500 is able to bring temp of a overclocked cpu + sli videocards + mb waterblock well below ambient temperature
Would a HC 300(1/4 hp) version be enough? after all the hc 500 consumes a lot of energy and if it is not really necessary it would be wasted.
I would have to cool a sr-2 mb , 2 xeon x5650 @4,2 ghz 1.4v, and one or two gtx 480.