Author: Robert Hyatt
Date: 05:12:55 01/21/99
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On January 21, 1999 at 06:25:27, Enrique Irazoqui wrote: >Changing CPU clock frequency in BIOS from 100 to 112 Mhz increases the speed of >my PII-400 by exactly 12%, as if I had a 450. Is this too good to be true? Any >undesirable side effects? > >Enrique It will do two things: (1) it increases the operating temperature of the CPU core, and the L2 cache. That will definitely decrease chip life. How much is unknown (ie a chip that would normally last 10 years may only last 8, although it is also possible that this can shorten its life to 1-2-3 years as well.) (2) you can produce non-detectable errors, where slight timing problems on the BUS go undetected, or memory is 'almost' able to keep up but not every time. We see _lots_ of problems doing this on the linux-smp mailing list. I remember the old saying 'if it sounds too good to be true, it probably is..'
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