So i wanna buy r9 290 pcs+(non reference cooler) but i dont know how much psu does it need. Powercolor says it need 750w minimum psu. But after many thread i read, a stock r9 290(reference cooler) just need 550w psu? Anyone have the same graphic card? And how many watt do i need? My chosen psu is corsair csm series 750w. Sorry for bad english.