Will this motherboard support crossfire 7850's?

Solution
yes it will be enough assuming it´s good quality unit ...
but you will need some motherboard with higher chipset due to pcie express links distribution...
970 chipset supports only 2.0 4x for second video card in crossfire mode...
990x will give you 2.0 8x + 2.0 8x which would be enough bandwidth for two 7850 ...
only 990FX chipset supports 2x 2.0 16x
yes it will be enough assuming it´s good quality unit ...
but you will need some motherboard with higher chipset due to pcie express links distribution...
970 chipset supports only 2.0 4x for second video card in crossfire mode...
990x will give you 2.0 8x + 2.0 8x which would be enough bandwidth for two 7850 ...
only 990FX chipset supports 2x 2.0 16x
 
Solution