Upgrade CPU locks up my machine

[robalan88]

I have an ASUS P3C2000 motherboard. It is i820 Chipset board. I am trying to upgrade the CPU from a Pentium II 400 MHz to a Pentium III 600B MHz with the 512KB cache and 133MHz FSB. I have 192 MB RAM installed. In DIMM1 slot is a single sided PC133 SDRAM and in slot DIMM2 is 64 MB of double sided PC100.

The machine works flawlessly with no problems at all with my Pentium II CPU installed. There are no hang-ups at all and Windows 98 has no problems. However, when I try to get the Pentium III 600B MHz CPU to work the machine becomes VERY unstable. It locks frequently even when I am in the CMOS looking at settings. I have tried different things in the CMOS, nothing seems to solve my lock-ups.

I tried removing the memory. It locks up if I just have the PC133 memory in there and it locks up if I just keep the PC100 in there. What settings in the CMOS would give me the most stable machine? I am at a lost why this is not working. Maybe my CPU is flawed? If the memory configuration is my problem, then why does it work without a problem with my Pentium II chip?

Any assistance in this matter would be appreciated.

Thanks

[BigBopper]

Make sure you are running your frontside bus at 100 mhz due to the 64 mb ram. What else do you have conencted to the MB ? maybe soemthing else is interfering with it ? does the new cpu have the correct voltage ? it should be different than the PII 400.