Bit-coin mining rig help

I have decide to take the plunge and put a dedicated mining rig together to start mining in the mining pool.I have a  xfx 7870 so all in need is a cpu,mother board,ram and a psu.But as a newbie miner i am no shore if somethink like a fx-8350 is needed or can i  get away with a g650 daul core.So my question is how cheap can some one put a mining platform together.

-Yeti

 

As long as you are sure the CPU won't bottleneck the GPU, you can use anything really.

Although I will say using a low power CPU now, will restrict you in how many more GPUs you can add at a later date.

a g650 would be fine for a mining rig even with 2 gpus.