Big Bang X power (vga question)??

[noureddine]

Hello all,
I want to take a MSI big bang x power, to put together an ATI HD 6970 and GTX 570, then two or an ATI 6970 and 5870.
What happens?

Currently my pc:
i7 920
Asus P6T SE
3GB 1600MHz DDR3 Kingston Hyper-X
Cooler Master 700w
VGA:
_sapphire edition hd6970 Bad Company 2 vietnam
_i have more,one HD5870

So either I change my 5870 for a gtx570, or I had to keep putting it with my 6970. What do you think?

 

[HU16E]

BB X does not have a Multi-GPU Computing Chip.