What is better in terms of CPU and gaming performance?

[NDDU Julius BSIT]

I have these options here:
Intel Core2Quad Q6600 (bundles with a MSI Motherboard at $36 used)
Intel Core i5-4670K (Still expensive about $110 ,about 5500 pesos used)
AMD A10-7860K (about $125 new)
AMD A8-7600 (about $77 new)

What are the pros and cons of each? I would like to pair one with my GTX 750Ti StormX OC. But as much as possible I don't want the Intel ones because I already have an existing FM2/FM2+ motherboard. But if they are not good, I can reconsidering buying a new motherboard

 

[jossrik]

The I5 is the fastest for gaming, but your 750Ti isn't exactly beast mode. Still, you want a capable processor. Refer to the heirarchy chart here :http://www.tomshardware.com/reviews/cpu-hierarchy,4312.html for reference of how well the processors are compared to each other. Higher up the chart, better gaming performance. Lower, worse gaming performance, not sure which one matches with your graphics card though. I would think the A8 would suffice in most games. I guess it depends on what you're playing.