Just posted this in:
http://www.tomshardware.com/answers/id-2833008/amd-intel.html
"For gaming, i5 4440 = FX 6300 in most games, i5 4690 = FX 8350 in most games. The AMD CPU and motherboard is usually a little less expensive and allows for a better GPU in the build."
You don't really need 8 cores for gaming, 6 is enough right now.
You don't need an expensive 990FX motherboard to overclock an FX CPU. Gigabyte GA-970A-UD3P us great for a single GPU. 990FX is for Crossfire / SLI setups due to extra PCIe lanes.
Here's an example if a good GTX 970 build using an FX 6350
https://www.youtube.com/watch?v=4ZHlo0DAI38
And a few of my own recent builds.
https://www.youtube.com/watch?v=5M0AAdaArIo
https://www.youtube.com/watch?v=MpwMV32Fkfo
https://www.youtube.com/watch?v=opXzfuoJkpg
You could probably do an FX 6300 or 6350 for $120, that board for $80, and a 212 EVO for $30 and be good for 4.5-4.6GHz spending around $230...probably less if you catch a holiday sale.