im kinda stuck on deciding which card to get because im planning on doing 3 monitors and that 1gb buff on the 670 really pulls me in . but the 7970 is slightly faster but uses much more power and the fact that i have a 500w psu makes it tough to choose also i dont want a new psu because i have a problem with my main HDDs motherboard sata connector it snapped. so can anyone help. also the £60 price gap douse not bother me in the slightest. and both of the power requirements are 500w.