i5 4670k vs Crossfire 2x r7850

Hardware Hub CPU
1

So right now I basically have the old $400 build from the teksyndicate channel but with an Asus 2gb 7850.

cpu:amd a10 5800k

gpu:Asus 2gb 7850

Motherboard:Asrock Fm2 a75pro4m

PSU:Corsair 600w crossfire ready

Heatsink: Xigmatek Dark Knight II

I want to be able to play Bf4 on high settings though and get a decent frame rate. I was originally just going to upgrade my motherboard and cpu to a 4670k and see how many more frames I would get but the Asus 7850 is on sale right now on newegg for only $100. So would it benefit me more to have an i5 or 2 7850's?

2

The 7850 should manage BF4 on high settings.

The A10 won't be able to handle dual 7850s. The APU/CPU is not powerful enough.