So i have acer predator g3620 i5 3350p gt 640 8 ram kingston 1600mhz 1 tb wd blue hdd and acer mobo http://www.game-debate.com/motherboard/index.php?mot_id=1410&motherboard=Acer%20Predator%20G3620 so i want to play all nowaday heavy games like bf4 ac4 watch dogs etc on high 1440x900 res and i may change to max 1600x900 so what card should i get gtx 770 or 760 and what brand should it be? Also i would need a new psu and a new fan so the psu should be max 85$ 600-650w and the fan i can spend on a fan 15$ also do i need a new cpu or i can stick with it another year?