Asus maximus iv gene z not seeing video card in second slot (sli)

[ez5]

Hi guys, trying to set up sli with 2 Evga gtx 660 sc's on maximus iv gene z(not gen3)

My problem is the second pcie slot won't recognize either card in the bios or windows 7 64. Have done all the common fixes to no avail, removing drivers reinstall clean, switching cards etc. What I can't understand is when I have a pciex1 card in the second slot it sees it and works fine but when I try putting either video card in the second slot the pc turns on runs and enters windows with no video. The first x16 slot works fine w/ both cards.

i5 2500K

Thanks in advance

 

[apower101]

PLease list all specs.
Also, doesn't the maxiimus gene have a switch to turn off pcie slots?

 

[ez5]

Sorry, 850watt thermaltake PSU, 16gb G skill ram,Corsair h60. I dont see anything in the bios or on the board to turn on or off 2nd pcie slot. I did set up bios to use pcie as main video and disabled multiple monitor for igpu (says to enable for Virtu). All of this hardware has been running together for 2 years with no problems accept the addition of the second video card.

 

[apower101]

HAve you contacted asus customer support? They are probably quite knowledgable about this type of thing...

 

[ez5]

No, the board is older don't think they will help. From my experience they tend to blame everything on other hardware.