OP, I am up and running w/ OC and manual fan speed now that my risers arrived and I can run multi-GPU. Obviously none of the End Users are going to be running single-GPU so there's no point in troubleshooting that further.
I think some members might have a desktop they normally use for web browsing or games; and then mine with the rest of the time: so I will fix it for them.
A single card is an edge case, so its a failure on my part not to have tested it earlier.
Asus Prime Z270-A mobo
Celeron G3930
4 GB Crucial DDR4 (single DIMM)
5 x Gigabyte GTX 1070 Founders Edition
Currently pulling 760W per Kill-A-Watt
Pic of the rig (sans case/frame - that's my project for this weekend):
ETH - Total Speed: 144.729 Mh/s, Total Shares: 90, Rejected: 0, Time: 00:55
ETH: GPU0 28.665 Mh/s, GPU1 29.208 Mh/s, GPU2 29.187 Mh/s, GPU3 29.206 Mh/s, GPU4 28.464 Mh/s
GPU0 t=62C fan=85%, GPU1 t=63C fan=85%, GPU2 t=62C fan=85%, GPU3 t=65C fan=85%, GPU4 t=60C fan=85%
Looks good. Please post another picture when your done with the frame. I like pictures of mining rigs.
THANK YOU SO MUCH for your hard work. I am going to run this rig for 24 hours (from 9pm EDT tonight till 9pm EDT Saturday) using your Ethereum address to show my appreciation, and hope others will follow my lead on this. I am not a stranger to Linux, but very much a novice, and I was not making much progress in getting Nvidia to play nice with Ubuntu. You saved me quite a bit of time and headaches. Keep up the great work!
Glad you like nvOC. Thanks for the hashes