Hey guys I recently built a 12 GPU mining Rig with Gtx 1070's but it keeps freezing on me when I start the mining. I have tried multiple things to try to fix it but I still can't Figure out. I thought it was the risers in the beggining but I tried mining with one row(6Gpu) and it worked then tried with the second row and it worked aswell but when they're together it either freezes or resets.

Program: Nicehash

My Specs:
GTX 1070

Asrock 110 Pro BTC+

16gb ram- I thought 8gb was enough but like I said earlier I just started different things and bought another 8gb so now I have 16gb

2 1300W PSU