3D gaming on AMD is not worth your time. The sole reason 3D gaming is even do-able is because of community fixes/Helix mods, without them you are stuck with about 5 games that support it, Tridef and AMD HD3D are both equally terrible.
Either sell off the 7970 and get a 760 or 770, or get a 3D monitor and use it for its other merits like 144Hz.