If the BIOS had been updated - AUTO to a BIOS is setting the clock speed, multiplier and all the voltages and the settings for the RAM including the timings and voltage and the devider between the CPU and RAM - if its set to AUTO it also controls the Northbridge and the Southbridge - (controlling the GPU, RAM)
It could be anything that has interrupted the MOBO settings - loose jumper is normally the culprit - I swap all mine out for ones on the back of CD/DVD rom ones as they are a much tighter fit ;)
Once spent about 2 hours trying to find while the MOBO was losing settings at every restart - thats the cause of me having no hair :rolleyes: