so ive been using an oldoldoldold nvida gtx 260+... bout time for an upgrade..

ive been considering either r7 260 or r9 270... or their older counterparts, 7850/7790.. coz thats around my budget.

My question is, how big is mantle? I will certainly play BF4 when it comes out, and i wonder how big of a deal mantle is.. is it worth to pay more for the r9 270 and get it?