I am currently looking to upgrade my GTX 660 to a better card. I have a 675 W PSU which would be a problem w/ the 290. I can get the 290 on NewEgg for about 390 and the 770 Classified on Amazon for 410. I am just wondering if it is worth it to buy a larger Watt PSU and the 290 than just the 770 and keep my PSU that I have now? Thanks, Ace.