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Sloooow clocking PIII 800EB processor

By rudyru522 ·
I'm working on a PC for a friend that crashes about every 2 hours. I downloaded a utility from Intes, and the chip's "expected" clock speed is 800MHz, but it is running at 401MHz. Any ideas?

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Sloooow clocking PIII 800EB processor

by TimTheToolMan In reply to Sloooow clocking PIII 800 ...

Hi,

This is probably caused by one or more of the following.

Incorrect FSB setting in the motherboard's BIOS
Incorrect Multiplier setting in the motherboard's BIOS
Old motherboard incapable of achieving the FSB and multiplier setting to reach 800Mhz.
Damaged CPU.

Check the BIOS first. (Hit DEL as you boot)

Cheers,
Tim.

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Sloooow clocking PIII 800EB processor

by rudyru522 In reply to Sloooow clocking PIII 800 ...

Tim; thanks so much; I'll check all those things!

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Sloooow clocking PIII 800EB processor

by rudyru522 In reply to Sloooow clocking PIII 800 ...

Latest analysis of this electronic doo-doo pile. I checked the multiplier, etc., and all seemed O.K. However, I noticed that the memory was set to 66/66. I tested the memory, and it IS 66/66. When I checked CMOS after setting the processor from 800MHz to Manual, it showed as 400MHZ. Then I replaced the memory with 133/100/66, and selected that as the memory "speed", and rebooted. CMOS now magically changed the processor speed to 800MHz, but the computer crashes about every 20 to 40 minutes! DANG! I read something about changing the SDRAM latency to 3 and the cycle time and RAS to CAS to 3, but that article said that sometimes 2 works best, and they are already set at 2.

I'm running out of ideas.

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