Hi, I am getting a computer at Ibuypower with a gtx 1080 ti, intel core i7-7700k, 16gb of ram, 2 terabytes and 250 ssd. I don't know what motherboard or power supply to choose. There, it show this two motherboards: ASRock Z270M-ITX/AC -- 1x PCIe x16, 6x USB 3.0, 2x USB 2.0, 1x M.2 [Intel Optane Ready] and ASRock FATAL1TY Z270 Gaming-ITX/ac -- 1x PCIe x16, 9x USB 3.0, 1x USB Type-C [Intel Optane Ready], the second one is 67 dollars more expensive. For the power supply. I currently choose the 30900 Watt - In Win Classic Series C900W - 80 PLUS Platinum, Full Modular, but I don't know if that would be too much. And also, another question, when I get the computer which port should I use to connect the computer to the monitor? Thank you guys a lot!!