Hey man, I've had a similar issue to that before, and my thought, is that it's possible that when you reset defaults, it reset to factory defaults, but your RAM XMP settings did not, i'd disable XMP in the bios, and see what happens, (I say this cause my new z170 board from gigabyte defaults to the XMP profile for my ram, and I had to disable that, before I was having the same error's.