I have been playing with the Vcore voltages on my GA-7NNXP motherboard equipped with an AMD XP 3200+ cpu due to heat issues. I have found significant reduction in cpu temperature. The initial heat problem may have been exacerbated by the board defaulting to a voltage of 1.7 when the AMD spec is 1.65. Playing around I found what I thought was a strange phenomenon and was hoping one of the hardware experts could explain.
If I change the Vcore to 1.525 at boot time and try to run Prime95, the system re-boots. If I change it to 1.55 at boot, run Prime95 (which once ran for almost 12 hours without errors at this setting--I chose to halt the program) for several minutes and then change the Vcore to 1.525, Prime95 now runs without errors. Why does it run the second time with the same settings? Does this mean I am at the line between stable and unstable, or have I already passed it? Should I stick with the 1.55 volt? Other than random re-boots, what are the other symptoms of excessive undervolting of the cpu? Thanks for your input, Jim Maki [EMAIL PROTECTED]
