To answer your question, I'm willing to bet the 2200G is acting as a bottleneck. However, perhaps there is some tweaking that can be done. What resolution and settings are you playing games at? If you're playing at high or extreme detail settings, those will likely have to come down, even if you're at 1080.
As for improving performance, what else do you have in your system? In particular, I'm curious how much ram you have, the dimm arrangement, and the speed of the ram. Is this a new PC build, or is it older and you've started having this experience? Are you sure the games are running off the 590 for graphics and not the 2200G?
