Yes - some people may need to RMA a board. It happens.
Not being able to get stable at some pre-defined idea of 'decent' overclock at whatever cost (including trashing your gear) is 'by the by'.
No CPU has a god given right to hit 4.6 / 4.8 or 5.0Mhz+. Its becoming plain to me that 4.5 and beyond is where most chips start to hit issues. Hell if they could all do 4.0Mhz even - don't you think Intel would market them as such?
All chips are different - and as has been proved many, many times over it's not the boards that are holding you back its the specific CPU. That why people will BIN them and charge extra to play.