hi , i bought one of you MSI 670 gtx power editions last week, it arrived dead on arrival, does not get a signal,(using dvi) which i was not happy about, i have found numerous posts about dvi socket not working as it should , am begining to think the reason they had a mass clear out was due to this Known issue, anyone from overclockers care to explain this?

Not something you can switch between, unless like me you running a Sandy CPU on a PCi-Gen3 MB... For Gen3 to work on my MB I need to install a Ivy Bridge CPU.