Enough for crossfire?

[zMarkon]

Hey,

So i've been told before that my PSU would be enough for xfire 7950's but i've seen websites that you enter the build and it tells you the recommended wattage. Two have recommended 800W and one 550W. I'm using the Corsair GS 700W PSU. Can anyone tell me for sure if I could crossfire 7950's with it?

Full build:
i5 4670K
MSI Z87-G45
1TB HDD
128GB SSD
Corsair H100
and hopefully 2x IceQ 7950's

Thanks

 

[zMarkon]

Appreciate all the replies, think i'll take the plunge and get another 7950 as i'm having no problem with temps etc and if my PSU can handle both @ stock speeds or even a mild overclock then its worth it rather than having to spend a lot more on a single GPU.