Z87-A Question

[song414]

Hi all,

I have a Z87-A and plan to crossfire (I have had two 7950's running in slots 1 and 2 before) This motherboard has 3 PCIe slots but on the specs it lists:

Expansion Slots
2 x PCIe 3.0/2.0 x16 (x16 or dual x8)
1 x PCIe 2.0 x16 (x2 mode)
2 x PCIe 2.0 x1
2 x PCI

Now slot 3 is the 1 x PCIe 2.0 x16 (2x mode)

My question is this... It makes more logical sense to do crossfire in slots 1 and 3 rather than 1 and 2 for better airflow. Will I be limited to 2x mode in the second card vs 8x if I put it in slot two or does it only do 2x mode if I put three cards in?

 

[Ieat]

Pretty sure the 3rd slot is only good for 2x mode. Usually only the really expensive boards allow you to switch the lanes. Anyway you would need a 8 slot case to use that 3rd slot.