I have a Packard Bell 910c that had a Cyrix MII-33GP 83mhz bus 3x(socket 7) processor which died. I replaced it with Intel 233 MMX cpu (socket 7) I cannot find any manual on this system or any details on the Motherboard. I did find the jumpers to set the CPU speed. But I can configure the jumpers for the cpu to run either at 250Mhz or 225Mhz, I cannot set it to run at 233mhz.(is 225 a strange number? I have not seen a 225mhz processor)anyway. I set it to run at 225mhz and when I reboot now, I get the following error "hard disk failure" I cannot see the hard drive in Dos either. But if I put the hard drive on another machine it works just fine. Could I have corrupted the CMOS. If so how do I reset it. Do I just use the jumpers if so do I need to leave the jumpers off for a few hours (somebody told me that is that true) Can somebody please help me to configure the 233 processor and to get the system back up and running. Thanks in advance Zeenat

If you want to run strictly at 233mhz, set your multiplier at 1.5x (it will be seen as 3.5x)...the FSB at 66mhz...the CPU voltage at 2.8v I've clocked a lot of 200MMX CPUs at 225mhz (3.0 x 75mhz). Even clocking a 233MMX at 225 w/75 FSB would probably be a little faster than at 233 w/66 FSB...the higher FSB would more than offset the 8mhz loss in overall clock speed. The 233MMX should run at 250mhz (3.0 x 83mhz)...I've run plenty of them at 250mhz (2.5 x 100mhz) without problems. Not many motherboards officially supported the 83mhz FSB though...it's possible that your PCI bus is running at 42mhz with a 83mhz FSB setting. Also, most old 72-pin SIMMs & early SDRAM (PC66?) could handle 75mhz FSB, but not 83mhz. Was your M2/333 originally clocked at 3.0 x 83mhz (250mhz)? or was it clocked at 3.5 x 75mhz (262.5mhz)? I used to clock them at 262.5mhz to avoid the probs I mentioned with the 83mhz FSB. Check your CPU voltage too...I believe the M2 ran at 2.9v, the MMX runs at 2.8v...the slight overvolting shouldn't hurt anything & might even help if you wanna try to run it at 250mhz, if not, set it to 2.8v

Thanks for your help Zeenat