@mcoffey 120.3 with high flow fans might do it. id figure its about 4 8800Ultras for heat load, so you might be pushing it. HEY THERMOCHILL, HERE WOULD BE A GREAT TIME TO INTRODUCE A 120.4!!! srry, just thought maybe Marci would hear it :p.

@MadDias the copper and aluminum corrode when in a loop together. yes there are anticorrosive fluids but they dont work all the time and things still corrode. many people here have experienced it first hand. Also a lot of people are running straight distiled water (plaining water) with a bit of Biocide to keep stuff from growing. with the Anti Corrosive fluids things tend to gunk up and reduce the flow in the loop and reduce the thermal transfer between the block and the water.