I just got into this last month. Hope this is the right place to post this.

here's my setup:

Custom-built case 30" x 18" x 12"

rig 1
8 PNY GTX 1060 3 GB    MPN:   VCGGTX10603PB
ASUS PRIME Z270-A LGA 1151
Windows 10
EVGA SuperNOVA 1000 G3 powering five cards and the risers, motherboard and SSD
EVGA 850 BQ just powering three of the cards

rig 2
8 PNY GTX 1060 3 GB    MPN:   VCGGTX10603XGPB-OC-BB  XLR8 Edition
ASUS PRIME Z270-A LGA 1151
Windows 10
EVGA SuperNOVA 1000 G3 powering five cards and the risers, motherboard and SSD
EVGA 850 BQ just powering three of the cards

I have the same setup on two rigs.. Except different version cards. on rig 1, I was able to take the power limit down to 68, core clock 46, memory clock 456, fan speed is 45. It is running at mid-60s Celsius. no problems.. I do have it in a larger room..

Rig 2. I have this in a smaller room. I have eight cards working, but it keeps shutting off. I am unable to take the power limit down. These are fancier cards with backplate. I have fans running on them. I also have the window open.. Trying to blow the air out the window. Trying everything and I can't get this to stay stable.

It's 80° in the small room. My air conditioner is in the main room where the other rig is at. I was hoping to put both rigs in the smaller room.  It is getting plenty of airflow around the cards.

Would Linux be better?
should I start pulling cards off one at a time to see if it is stable then?

I ordered an air conditioner for small rooms. Will that help?

It is supposed to be mid-90s here all week and who knows what about August or beyond. Thanks for any help. I used to watch gold rush on discovery and now I know why those guys get so antsy when their mining rigs are not working.