Setup is pretty much what the title says.
To be more specific:
Mobo - P8Z77-m Pro
GPU1 - GTX 560ti (PCI-E 2.0 x 16)
GPU2 - GTX 970 (planning to get this one soon, hence the question) (PCI-E 3.0 x 16)
970 will be used for main monitor (gaming, working)
560ti for support monitor 1080p (less...