PSU is a generic CaseGears Eco-Element 750w
Drivers should be up to date, it was a fresh install of everything when I received my new HDD, Windows, Games, Drivers, everything.
I did go from nvidia --> AMD, but again, with a new HDD i don't think that would cause an issue.
Just checked to make sure my SATA cable was also as flat as possible.
Stop code is STOP 0x00000124