I'm having a hard time finding a shop in Europe where this motherboard is available. Have you got some links?
I was also wondering if the motherboard had to be powered by ALL 24 pin connectors or if 3 molex + 1x 24 pin is enough?
I was also wondering if the motherboard had to be powered by ALL 24 pin connectors or if 3 molex + 1x 24 pin is enough?
You don't need to use the 4-pin molex connectors on the motherboard when using powered risers. They are only there for the few people that may still use ribbon unpowered risers.
https://youtu.be/6e7ywLfRogQ?t=4628
So why dont we all use unpowered risers when we can get power from the pci-e slots?
Because ribbon-type risers are a ROYAL PAIN to deal with compared to USB-cable-type, and you really need powered risers ANYWAY to avoid overloading the power traces on the MB even WITH the "aux power MOLEX connectors" in use if you run a lot of cards.
I am trying to setup 12x 1080ti in my B250. Should I use the mobo's "aux power molex" even if I am using 12x powered risers??
So far I got to set 7x 1080ti (4x in A slots and 3 in B slots), but I cant make windows recognize the 8th vga. The slot appears as green on boot, but Win 10 refuses to find it.
humm, I havent tested other drivers, I am using the latest one.
So, the ones who have 12x nvidia VGAs, which driver are you using??
ohh sorry, the question wasnt for you, but for the people with nvidia cards in this thread.
probably it will be difficult to put so many equipment near
for 12 cards its perfect for more i am with you its too difficult 
yea, not too hard to setup 12 cards. They are all in place already, I just need to make Win10 recognize it now.