P55a-UD3 PCI-E Slot question

Thinking of crossfiring 2 x 6850's, since I've learnt that a x4 2.0 PCI-E SLI/Xfire is of hardly any noticeable disadvantage.

I just want to clarify something since the manual isn't clear.

On my P55a-UD3 there are 2 PCI-E slots.

x16 (2.0)

and a

x4 (???)

Can someone tell me whether or not the x4 slot conforms to 2.0 standard?

------

If it doesn't I will probably reconsider xfiring.
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  1. I'm pretty sure it's only PCI-E 1.1, and the second PCI-E x16 slot will be disabled, while the first one will run at x8 if you use SATA III or USB 3.0 I believe.
  2. Okay, So i just spent 20minutes putting my 8800GT into the x4 slot on my motherboard. (20 minutes because I have to re-arrange cables etc)

    For those wondering the x4 slot, IS 2.0!!!

    http://i288.photobucket.com/albums/ll198/DeathFrogg/20.jpg

    CROSSFIRE HERE I COME.
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