Will my psu run radeon 5670?

Yeah but that depends really if you've got like an array of 12 HDD's no , and also the mobo and processor your running , to be safe you should have more watts on your psu than your system actually needs so your not 100% loading the psu at all times, I'd recommend 550W-850W , 850W uming you;ve got a high end mobo and processor with an array of HDD"s along with optical drives , that umption came for people who do a lot of video editing in case you were wondering lol