For Gaming You Should Go For Amd A series Processor
A10-6700, A8-6600K, A10-5700, A8-6500, A8-5500
Choose What ever fits In Your budget They all Are Made For Gaming Purpose and supports FM2 board And 1866mhz ram
I am recommending this because they are made for gaming
and you could enjoy dual graphics If You Use AMD Graphics Card
Here Are Some Boards Choose According to your Budget
ASUS F2A85-M-LE Motherboard
ASUS F2A85-M Motherboard
MSI FM2-A85XMA-P33 16GB DDR3
My Advise ;;Never Sacrifice on Motherboard;;