Quote from: Leass on August 21, 2017, 10:18:19 PM

Well I didn't enabled anything in bios before windows setup but I've made bootable usb with Rufus, GPT partitioning for UEFI systems, so I assumed that it'll for sure be UEFI.
Only thing I've changed in bios was 4g Enable, because it was disabled by default, and 3 of my cards was with yellow triangle in device manager, switching 4G solved it, but during some boots not all cards are again found by OS, and they appear as Unknown VGA Device on Unknown Device's list.
Really don't know what I've messed up. Maybe PSU draw offset is too low? It's 1600W, even when counting efficiency on 100% load it should be minimum 1350W (85%). Dont know how much Zotac and Asus draws at 75% tdp but MSI was ~210w on skein/ea so I've just distributed them 2 on one psu with mobo and cpu, and 3 on other alone.

I have the same MB, MSI Z270A-PRO, now I have 4 GPU's and another is coming from mail on next week, maybe I'll face the same problem.
Please share with us the solution has soon as possible guys, Thanks.

MSI Z270A-PRO
I7 7700
16Gb RAM
3 EVGA 1080TI Black SC
1 MSI 1080TI AERO

With this setup can I use 12 GPU with riser hub??

Riser HUB - https://pt.aliexpress.com/store/product/PCI-e-Express-1X-to-3-Port-1X-Switch-Multiplier-HUB-Riser-Card-USB-Cable/1627923_32775884960.html