Unfortunately I must write, that nvOS is really unstable with 11 GPUs in my case. I'm sad... :-( In this case, each miner crash a few minutes after mining for memory segmentation fault, in 70% of startups watchdog kill mining process for maybe 20x times. In general there are many epochs without mining - when nvOS set up GPUs, or restating whole mining process. After GPUs re-allocation there are great improvement in stability. So, someone who has in one rig more that 8 cards and succesfully OCed?

I'm solving miners crashing, OC all day. My conclusion is nvOS v0019 is unstable and I can't trust it - with 11x GPUs.

It's little strange that if rig has only 8 cards, so it's stable. So, I've two rigs now, with 8 gpus, and 3 gpus. Both use nvOS and works :-) I don't understand why both rigs can have different OC settings.

On rig with 8 gpus is this:

• power limit: 208W
• core: +85
• mem: +480
• Mobo: ASRock BTC Pro+
• PSU 1200W, 1700W
• 7x Gigabite AORUS 1080Ti Extreme Water
• 1x Zotac Extreme 1080Ti AMP
• i5-7600K
• used these risers, powered via SATA https://www.aliexpress.com/item/10pcs-TISHRIC-2018-VER008S-Molex-4PIN-15PIN-SATA-6PIN-3-in-1-PCIE-PCI-Express-Riser/32828808283.html?spm=a2g0s.9042311.0.0.szfVUP

On rig with 3 gpus is this:

• power limit: 225W
• core: +120
• mem: +900
• Mobo: ASUS Maximus Ranger IV
• PSU 1700W
• 3x Gigabite AORUS 1080Ti Extreme Water
• i7-4790K

both rigs use CPU mining too

Hash rates are for ZCash:

• with 8 gpus - about 5550 Sol/s
• with 3 gpus - about 2150 Sol/s