I have a Compaq presario 5686 with a Intel P III 450 Mhz. 128 Mb 100Mhz SDRAM and 440BX/ZX chipset. It is is a genuine Compaq motherboard which allow me to change the processor speed between 300 to 500 Mhz. But no matter what I do the machine come up with 450 Mhz as I bought it. There is no cpu speed options in the Bios either. Can anyone help me speeding this system up?