PCIE question/Issue

[robertf]

Hi

I have a Z97X-Gamning 5 board and have 4 GPU (HD7970) running nicely in x16 slot and the 3 x1 slots in Utbutu 14.04

Problem is when I add a 5th GPU to PCIE x4 it turns off the x1 slots I know that but cant seem to over ride it in the BIOS, but when I add another GPU to the remaining x8 slot the machine wont boot.

Any pointers...

Cheers

Rob

[epixoip]

Your motherboard likely doesn't support using all of the slots at once. Many boards we've tested in the past only support 4 GPUs. Other possible issues: you do not have enough PCI-e lanes on the CPU and your board doesn't have a PLX chip; you do not have 64-bit PCI-e addressing enabled in the BIOS, or your BIOS does not support 64-bit PCI-e addressing.