Didn't have to change anything on my opus for the 13000 and its been working for a year now. Complete plug and play just as it should be. The M2 obviously isn't universally compliant with motherboards like every other power supplies are. There are posts all over the place that you have to change X to get it to work with Y. This is just stupid and IMHO completely unacceptable. How can you blame a mobo when every other power supply I have ever tried with it works?