P8Z68 V LE with crossfire 6950s

[team55]

Ive just had a new PC build from a local store with the "P8Z68 V LE" motherboard. I had 2 6950's installed in it. Ive noticed that they are not running crossfire and I have attempted to do it myself but can't see to get it to work. I'm not very a tech wiz but im beginning to thing I need more PCI-E bus?

So my question is can I run 6950s crossfire on a P8Z68 V LE?

Cheers

 

[team55]

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131773&Tpk=P8Z68%20V%20LE

Link to the board

 

[team55]

I seem to have finally sorted this out myself. Crossfire will work in x16 x4 with the x4 bottlenecking about 15-25%. Pretty sure the sales guy should have mentioned that to me :/