about the voltage, my default was, i believe, 1.3. but when i upped the multiplier, leaving the voltage at default produced random reboots and overall unstability. i had looked at a guide in the jan '08 issue of
maximum pc and looking at voltage setting for various amd cpu's and of the 4 they overclocked, all of them had voltages set for 1.5.
the same was the case for the dram timings. the default was 1.8v so i upped the voltage to 2.0, because leaving it at 1.8v or 1.9v did the same thing as leaving the cpu voltage at stock