Yeah maybe today 100MHz difference might not seem like much, but it's a >20% increase which is nothing to sneeze at! I did a similar one (K6-2 366MHz to K6-2 55

Yeah maybe today 100MHz difference might not seem like much, but it's a >20% increase which is nothing to sneeze at! I did a similar one (K6-2 366MHz to K6-2 550MHz). Those lower-clocked Durons you mentioned were fantastic value though - I remember buying a 700 MHz part and running it at 900 MHz (after using a pencil to short those traces on the chip that let you manipulate the clock multiplier)