R5E not recognising more than one graphics card at a time

[Jbonnett]

Hi,
I have tried adding a new graphics card to my system but it won't recognise anything unless it's in the first PCI slot.
I have tried all slots, the new card works in the first slot and the old one has the same problem with the rest of the slots too, I just can't add more than one card.

Is there a setting that I don't know about?

Thanks,
Jamie

[Jbonnett]

Nevermind I derped, I forgot that there were physical PCIE switches on the board.

[JustinThyme]

Doh!