PCI lanes required for dual 690gtx

[3lgringo]

Hi there!

So I managed to empty my bank account and went all out on my new gaming rig.
So far I got:

PSU:1200w corsair
GPU: 2x Nvidia 690gtx
CPU: 3770k
RAM: 16gb tridentX
SSD: 2x samsung 830 512gb
3x 23' displays


So now all i need is a motherboard and my question is running those two 690's(quad sli) on 8x/8x PCI will I notice any loss in performance? or should I be looking for a board with PLX chip that allows 16x/16x SLI?
Because atm I'm inclined to buy the Asus Maximus V formula wich only supports a 8x/8x while other boards such as the sniper 3 from gigabyte support 16x/16x.

Thanks in advance!

 

[doron]

The Maximus V is a nice board indeed, and it's pcie 3.0 so it's like pcie 2.0 x16 and I guess this should be enough.

But..

See this - http://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/23.html

There's no more than 1% difference in pcie 3.0 x16 and x8 but then again the cards tested were the 7970 and 680. There could barely be a difference between x16 and x8 with the 690 but if I were you I would get a board with x16 / x16 just to be positive that I'm getting the most out of these cards.

 

[3lgringo]

Thanks for the link nice info there!
Yeah I think your right guess its between the Gigabyte sniper 3 and the Evga Z77 then. Time to look up some reviews!