I have 560ti SLI aswell, and i had this problem too. I ran msi afterburner to monitor the usage, and one gpu was not used at all. Other games such as BF3, both gpus were fully used.
I just reinstalled drivers, that solved my problem. Using 311…
Could be useful for new players to the game. Experienced players know that you survive longer in a group, rather then by yourself.
And as mentioned, could make life easier for the commander. Example: "alpha group take and hold Deposit" instead…