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Date: Sat, 30 Aug 2003 11:44:19 -0400
From: Chuck Swiger <cswiger@mac.com>
Organization: The Courts of Chaos
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To: Stephen L Martin <freebsd@jyroscop.cotse.net>
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cc: freebsd-questions@freebsd.org
Subject: Re: 500Mhz reported as 133Mhz w\ dmesg
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Stephen L Martin wrote:
> I have a IBM ThinkPad 600X. 500Mhz Pentium III, 128MB RAM.
> Machine type is 2645-4EU
[ ... ]
> When I do a dmesg it reports:
> 
> CPU: Intel Pentium III (135.87-MHz 686-class CPU)
>   Origin = "GenuineIntel" Id = 0x681 Stepping = 1
>   Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,
> MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
> 
> I have tried recompiling the kernel with only I686 to no avail.

Laptops generally have a BIOS option which controls the speeds they run at, 
depending on whether the system is on AC or battery power.  You might be able to 
use ACPI to adjust CPU throttling, too, but I haven't had luck with that.

-- 
-Chuck