Well as a poor high school student who just purchased a 80+silver used BQ-SU7 500w for 25euros im looking to give my R7 250, and put some more money to buy a decent gpu that wont bottleneck my X4 750, and im debating over a gtx 760 or a r9 270x as they are the top cards that will give me much performance and wont bottleneck my cpu. Would like the 4gb versions tho.