Hi all,

I'm having a weird issue with a GTX 1060 :

With 4 GPUs, all cards are working fine.
When I add a 5th card, this particular card stops working (seen in lspci, not in nvidia-smi), let's call her 'Bitchy'.
I tried moving the cards around on different PCIe slots, it's always Bitchy that's unhappy.
It doesn't matter what the 5th card is, I tried with a 750ti and a 1060.
Bitchy just doesn't like when the rig gets too crowded...

Asrock H81 pro btc with molex plugged in and powered risers. Ubuntu 16.04. Driver Version: 375.74
750W Corsair PSU. 4 GTX 1060 (including bitchy), plus another card puts the total power draw to 600W tops...

Has anyone encountered that issue before ? Any idea ?