If you're going to be playing games such as BF3 on Single Player, you won't experience much bottleneck, as it's highly GPU dependant. However, if you're going to be playing Multiplayer, you MAY experience some slowdowns, but it shouldn't be too significant. The SB i3's are still very fast and it should game just fine.
Just my personal preference, but I would prefer to go with an i3+7850.