Asus Z370-P problem

[OrangeBjorn]

I have a brand new Asus Z370-P motherboard that seems to able only boot once. If I reboot the system the screen stays black. I have to clear the CMOS in order to make it work again. This seems to be only the case wihen I use the PCI-E slot for graphics. I t tried 2 graphics card, a GTX 760 and a GTX1050. I flashed the bios to the latest version. I tried to set the graphics in the BIOS to use PCI-E only. Nothing seems to work. I use an I5-8400 CPU and 2x8GB of DDR4 2133 memory, nothing is overclocked. 

[m0k]

RMA it - sounds like you got a bad unit

[OrangeBjorn]

Two in a row? Forgot to add: this is my second motherboard, had the same issue with the first one.

[OrangeBjorn]

So it turned out to the RAM, I tried it with 2x 4GB (instead if 2x 8GB) and now it seems to be working.