Stupid Question: Can I fit a GTX 770 GPU.

Solution
the gaming 3 technically supports cfx but it's not optimal. for good cfx performance from the mobo you'll need two pcie x16 slots running at at least x8 speed (i.e. x8+x8, 8 lanes per slot). gaming 3 has 16 lanes in the top (main) slot coming from the cpu and 4x gen 2.0 lanes from the chipset. so users won't get pcie lanes split off the cpu. the mobo will run a single gfx card, but if you have crossfire in your mind, try a higher level mobo like gaming 5 or asus z97 pro.
the gaming 3 technically supports cfx but it's not optimal. for good cfx performance from the mobo you'll need two pcie x16 slots running at at least x8 speed (i.e. x8+x8, 8 lanes per slot). gaming 3 has 16 lanes in the top (main) slot coming from the cpu and 4x gen 2.0 lanes from the chipset. so users won't get pcie lanes split off the cpu. the mobo will run a single gfx card, but if you have crossfire in your mind, try a higher level mobo like gaming 5 or asus z97 pro.
 
Solution