sli 7970 upgrade for 3 monitors

atomik9274

Honorable
Apr 26, 2012
29
0
10,530
so i finished my pc and im looking to start upgradng my gpu since i got a 460 for a temporary. i wanna go triple monitor 5760x1080. im wondering if two 7970's will handle this since it would be cheaper than one 780. i wanna be able to play games such as battlefield 4 on high-ultra staying above 40 fps. i have a 3570k to back it up
if so should i look into the 6gb or would 3gb be fine?
please no one trying to say a single gpu would be better. im going to be getting them off of ebay so it would save me some money and two 7970's are better than a 780 im just wondering how they would handle
which 7970 should i look into? (gigabyte,asus,etc..)