I'd think you'd be okay with the 760K. Although, I don't know if that page I linked was single player or multiplayer. Multiplayer is harder for the CPU to run.
It depends on the games. The 760K is enough for many games, but the CPU heavy ones, and especially the ones meant for 2-3 cores, will make the 760K choke before the HD 7950.
Do you already have the 760K, or are you thinking about getting it?
I'd think you'd be okay with the 760K. Although, I don't know if that page I linked was single player or multiplayer. Multiplayer is harder for the CPU to run.