Hi Cryptomined, would you be able to upload the PDF? It will help those of us who are literate in Mandarin 
I am able to detect all 12 GPU from the bios, but I am only able to boot with 8/12 1080 Ti into Windows 10 successfully. The moment I have the 9th card inserted, the system will be stuck at the windows boot up screen and refuse to boot up. The moment I reboot with only 8 GPU inserted, everything works fine.
I have done the following:
- update BIOS to latest
- reinstall OS in UEFI
I wonder if anyone encounter similar issue before?
Model: BTC-250-BTC Pro v6
BIOS: B25DF710 (July 10, 2017)
OS: Windows 10 x64 Pro
RAM: 8GB