GA-EX58-UD5, x4 PCI express port?

[Steven185]

Hi I own a UD5 with two 5870s crossfired. I'm willing to add a (x4) hardware raid controller, would that affect the function of the other (blue) PCI-E ports (i.e. be downgraded to x8 speeds)? Of course I'm talking about the x4 slot (the small orange one) not the x16 one which I always leave unpopulated (so that I won't downgrade my primary ports' speeds).

 In other words would I be able to have UD5 function as a x16,x16,x4 board? (instead of a x16,x8,x8)

Thanks.

[Beekeeper]

looking at the block diagram of this mobo i would say it should not affect your VGA's transfer speed through PCI-E