First, thank you for giving my situation a chance.
A quick summary. This is my 3rd build. It's mini itx because of limited desk space. This is possibly my 6th motherboard (I lost track after an rma sent me back 2 boards).
Anywho this is my situation:
Bought a used Asus Maximus VIII impact, and this is where my problems started.
I had a working system with 2 ssd, 1 hdd (OS on smallest 256gb ssd).
Set up the mb and plugged in the OS ssd by itself. Boot up and load optimized defaults. Restart and I get into a boot loop of preparing automatic repair.
I go through a couple troubleshooting steps with Asus and eventually return the board and buy a new one. Same mb (impact viii).
Same story. So I figured maybe it's the ssd. Get a spare ssd that hasn't been opened. Load it up and plug in the windows 10 usb you can buy from best buy. Mb won't accept the OS. Everytime I select win 64 bit it loads files then restarts and I'm back to the same screen. Call asus, troubleshoot and rma this board.
Meanwhile I decide to buy the Asus Pro gaming Z170I. I figured it was just that board. Get the new pro board and it's the same problem. Won't accept the OS and just restarts. RMA this board.
This is now the present: I received the new pro gaming board and the impact viii. I load up the mb and both give me the same problems.
I have the great idea to try loading the OS while the brand new ssd is hooked up to my old matx board in my old system. Works like a charm with the win 10 usb from BB. Great!!
Hook up the new ssd to the pro gaming, and now I'm back to preparing automatic repair. On both boards.
I'm starting to think it's something on my end instead of the Asus boards being bad. I just can't explain why it works perfectly on the old matx board, but doesn't on the new mitx boards.
Also, all the ram and other components have been triple checked for compatibility.
Please help, any suggestions?
Also, sorry for posting this on my phone. I'll edit it when I get to my laptop.