Hi, i just wanna know can my psu http://www.njoy.ro/PSU/500wgx here is the link of it, go with R9 270x or HD 7970 or 7950 without any problems..My other specs are A8 5500( i will upgrade to x4 860k soon) and 8 gb ram..I want to upgrade so i just want to ask if my psu is enough for these cards..