We are informed by a tech who works at asus that these motherboards frequently require a chip set replacement.
Who is 'we'? What motherboards?? The model wasn't even mentioned. I'd like to see some proof.
The fact that one of the symptoms is a voltage reading of .54 volts in the 3.3 volt rail indicates that the chip set is drawing too much current and overloading the power supply; a south bridge failure.
There wasn't even a mention of any bad voltage readings.