solid state drive and hard disk drive

I've had intermittent trouble with my SSD, usually in the form of it randomly appearing and disappearing (both from Windows and from the BIOS). After trial and error I seem to have narrowed it down to a power problem. The SDD seems to work fine when plugged into SATA and power, but using that...

This is my first time looking into building a computer for myself and I need help with my ambition. I plan for my dream computer to use both a 500Gb M.2 PCIe SSD and 1Tb SATA HDD and I want to know which motherboard could support both. Also, the motherboard has to be able to support Intel 8th...