Cant get 3 GFX cards working?

[anders68]

Hi! Im trying to get three (3) grafixcards working in my Windows 10 setup with C4D and latest Octane Render.
I can only get two cards working in Octane/Windows 10

Tried putting two Titan-X first with 1080 as a third card. Only first two cards is seen by system.
Put 1080 first and two Titan-X after. Only first two cards is seen by system.

Is there any BIOS setting and/or windows drivers i need to run three GFX cards?

My system:
MB: ASUS Z10PE-D8 WS (only one CPU)
CPU1: Intel Xeon E5-2687Wv3 3.10Ghz
PCU: Corsair 1500 (lots of power)
SSD and CD
GPU1: Nvidia Geforce GTX 1080 (brand new)
GPU2: Nvidia Geforce GTX Titan X
GPU3: Nvidia Geforce GTX Titan X (will not register in Windows 10)

//Anders

[alaman64]

In My Asus board (Z97-A) There is an option in bios, don't remember the page, It's a drop down. that turns on the the 3rd PCI-E slot., by default the slot is off because it shares bandwidth with USB 3.1.. , so you either get the 3rd PCI-E slot or USB 3.1. And the default is USB 3.1.

It might be the same on your board.

Nick

[anders68]

In My Asus board (Z97-A) There is an option in bios, don't remember the page, It's a drop down. that turns on the the 3rd PCI-E slot., by default the slot is off because it shares bandwidth with USB 3.1.. , so you either get the 3rd PCI-E slot or USB 3.1. And the default is USB 3.1.

It might be the same on your board.

Nick

Thank you for input! I have cards in slot 1 and 3 which works fine. Tried a third Titan X in 6:th slot now, but it does not work either.

//Anders