i was thinking of getting the r9 290, right now i have an xfx 7870 dd and an fx 6300 at 4.5 ghz. Im not sure that the r9 290 will run on my coolermaster GX750w (d3 version). im also thinking of making an open loop system for my school project, so will the psu handle the r9 290 and the pump, rads and fans etc.?