I had a PC mobo go south. It had a Athlon 1.8 on it. Replaced the mobo with another one I had (don't have the brand name with me right now) and it reports at boot I am running a Athlon 1.3! I saw a setting jumper on the board for the CPU speed. It was set at 100mhz. and can be changed to 133mhz. Should I do this? Harry G