Thanks guys for the replies to my ONDA B250 question. Today I already received tracking number and expected delivery for the motherboards is on Monday. These are moving fast.
I am building my first (mining) rig and have more questions. I am posting them here because I am trying to follow Philip's suggestions from page 1.
Actually it's my Amazon "shopping cart" and would like to ask you if everything looks fine and I didn't miss anything:

1) I will initially order 4 1080TI, atm nothing in stock. I've read that I should take the 3 fan version for better cooling. The cards will be max 5cm wide.
2) using ONDA B250 from Sidonia. I will use the PCIEx slots only.
3) 1xRAM for 2 boards https://www.amazon.de/Gskill-F4-2400C16D-16GRS-Memory-2400-Ripjaws/dp/B017UC3VOM
4) 1xCPU https://www.amazon.de/Intel-i5-7400T-Prozessoren-lga1151-64-Bit/dp/B01MZ9GJ1N
5) 1xSSD https://www.amazon.de/Samsung-MZ-7PC128D-EU-interne-6-0Gbps/dp/B005OK6VTA/
6) 1xPSU https://www.amazon.de/Corsair-CP-9020008-EU-Platinum-1200Watt-Netzteil/dp/B008O0ZKMQ

Will the Corsair AX1200i have all the cables for 4x1080TIs? Will I need some extension cables for power?
Have I missed anything?