Got my system to POST, but after selecting 64 bit windows 10 install from a brand new Windows 10 flash drive, it freezes while the dots are spinning around my motherboard logo. I was able to start in safe mode (through f8 on installation select), which let me get past the freezing, install...
So I solved this issue 2 minutes after posting this thread. Turns out on a Rosewill Photon 750 PSU the motherboard cable has a split connection going in to the PSU. I had not plugged in the smaller cable on the right side. I hope this can help anyone who runs into this issue using the Photon...
I've built over 20 computers and finally ran into my first build that won't boot. Upon finishing, RGB from MoBo lights up when PSU turned on (selecting I from I/O). When power button on case pressed, GPU lights flash regularly and GPU RGB is illuminated, but no fans in case (including CPU) spin...