Soldato
It will defo bottleneck a four gpu setup on bf4. However Mantle should help greatly with that. Have you tried Mantle? As you're on Tahiti you may need to change a couple of BF4 settings via a user.cfg file, but i can help you with that. Mantle also uses more vram, so you may need to lower your settings a tad. However you will get much better gpu scaling and cpu performance. You really need an i7 minimum for four gpu's.
Yes please!!!!!!!! I'd likey these user.cfg settings for tahiti when convenient Lt MAtt.
Thanks in advance!