A lot of the RAM/Voltage/MB problems were resolved when the Enhanced Performance Profile portions of the SPD standard were added.... before, the SPD was often populated with the advanced performance mode, which required more than 1.8V, only... and the motherboard would obligingly read the SPD and set the timing as such, but if your MB was set on AUTO for it's ram voltage, the RAM only got 1.8V and failed... catch 22 on setting up the motherboard... NOW, the Jedec (first read) portion of the SPD gets set with some rather slow timings (stock?) so that the RAM will work at 1.8V, and the EPP profile in the SPD has the advanced timimgs which require more volts...