Multiple cards fails to boot

#1

I am able to add one nvidia 1070 GPU to the x16 slot and everything works fine, the card is detected and the hiveOS boots. Once I add additional cards nothing boots. Where should I look to troubleshoot ?

#2

I’m using a TB250 BTC Pro motherboard, I just changed all PCIe slots from Auto to GEN2 and going to test

#3

Looks like it was a bad riser in one of the cards. I went one by one until I found it! Risers are usually the culprit