The rig I'm haven problems with is a 5 card gtx 1080 gigabyte
https://www.gigabyte.com/Graphics-Card/GV-N1080AORUS-X-8GD#kf. I built a new mining room with 1 exhaust 8 inch fan to the outside and 2 intake fans from my basement that's always has cold air. I used a wire rack to hang the cards from. The mother board is on a wood base. After three days of mining in this room it started locking up and restarting. Than it would hard lock and restart but only 2 cards would come back on and the other 3 would not because the second psu would not turn on. The main psu has had no problems at all and runs the system and two cards. The second psu only runs 3 cards powers the risers and cards. I have tried it with oc settings and stock settings on the cards same problem. I have replaced the psu 3 times. I have uninstalled the NVidia drivers and reinstalled them. I had this system for a month running with no problems before I built this room. Its in the middle rack. There is a 1070ti rig and rx 580 rig on the lowest shelf. They have zero problems. I have also replaced the psu link cable with no change. Today before I left for work I unplugged one of the cards and now there is only two running on the second psu but I fear its going to do the same thing. Where do I go from here? If it crashes again do I switch the cards that are running and wait and see or should I replace all risers boards?
Parts list.
Msi z270 sli plus mother board
8 gigs of adata xpg 3200 memory
intel g4560 cpu
adata 128 gig ssd
5 gigabyte gtx 1080 exetreme cards
https://www.gigabyte.com/Graphics-Card/GV-N1080AORUS-X-8GD#kf main psu is seasonic focus plus plat 850 watt
second psu i have tried is seasonic 850w plat, seasonic 750w plat, seasoinc focus gold 850, evga 850 supernova g2
Windows 10 pro, all updates done and rechecked.
Mining room temp ranges from 88-93 I have exhuast on super low so some of the heat goes in the house to save cost of heating and power
Power is 240volt pdu to each psu on all rigs.
