I also have COMPAQ mobo. It is 5070 with 400MHZ AMD II. I overclocked it to 450MHZ and it runs rock solid. I am not sure about PII..... On the motherboard there is a multiplier setting and system bus setting. Just change them according to what it says on the mobo. On the mobo, it tells you the settings for different speeds.
Let me know
PC133 128MB ECC
WD SCSI2 10K 5.2ms 18.3G
Vortex2 w/ digital out
Sony MHC-5500 Digital Signal Processer - 30 equalizers and Dynamic Sound