Here's the thing, i have old pc or mid-old pc. That has i5 650 3.2ghz,500gb hdd, 8gb ram. I planning to change my gpu to sapphire vapor x r9 270x oc with hd 5440/5540 (that's inside my cpu) can it run the presnent and future demands game like : bf3,4, and hardline, cod bo2,aw,bo3,crysis 3 and some other. After changing gpu will i get bottleneck yes or no? Or do i nid to get r9 280x?or buy/build a new pc?