Asus Maximus VI Extreme max GPU count?

[sametbars]

Hello, I have;

Mobo: Asus Maximus VI Extreme
CPU: i7-4770k
PSU: 1600W

6 x GPUs
2 x 1 to 4 PCIe slot expansion cards

I have tried almost every combination to get 6 GPUs working, but I only managed to run it with 5 GPUs. When I plug the 6th GPU, it will not boot.

Is the maximum number of GPU that I can use with this mobo 5 or am I doing something wrong?

[Vann]

Not all motherboards support 6 or more cards, even if you have the PCI-E slots on the board. A few settings you can try in the BIOS:

- Make sure you are using the current BIOS for your motherboard
- Change the PCI-E link speeds to GEN 2 or GEN 1
- Enable '4G Decoding' if you have that option
- Disable the integrated GPU and set the Primary display to PCI-E (Usually PCI-E slot 1)
- Disable the integrated audio controller

[sametbars]

Not all motherboards support 6 or more cards, even if you have the PCI-E slots on the board. A few settings you can try in the BIOS:

- Make sure you are using the current BIOS for your motherboard
- Change the PCI-E link speeds to GEN 2 or GEN 1
- Enable '4G Decoding' if you have that option
- Disable the integrated GPU and set the Primary display to PCI-E (Usually PCI-E slot 1)
- Disable the integrated audio controller

I have tried all of these, except the '4G Decoding' because it doesn't exist in my bios :/