Date: Wed, 25 Feb 1998 11:55:05 -0800 From: Mika Nystrom <mika@cs.caltech.edu> To: Atipa <freebsd@atipa.com>, adoane@eagle.ais.net, freebsd-smp@FreeBSD.ORG Subject: Re: Dual proc PII MB of choice? Message-ID: <199802251955.LAA16742@stun4p.cs.caltech.edu> In-Reply-To: Your message of "Tue, 24 Feb 1998 17:33:07 MST." <Pine.BSF.3.91.980224172723.5525B-100000@dot.ishiboo.com>
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Atipa writes:
>
>{...}
>> The only thing I've found in the manual that I don't like is that
>> it appears you cannot independantly set the CPU and bus speeds (for
>> overclocking). You can on the ASUS and Super Micro.
>{...}
>
>Unless you like wasting your time troubleshooting and annoying your
>distributors, overclocking is a very very bad idea.
>
>Products are given a specific rating on purpose; it is not "random" as
>some may make it sound. Although it is in style to overclock, it should
>be strongly discouraged.
>
>Our failure rates on CPUs have jumped by an order of magnitude since
>people have started oc'ing. Overclocking voids most distributors
>warranties, and is not worth the risk. The CPU is hardly ever the
>bottleneck anyway.
This is interesting. I would tend to think that if the CPU in question
exists in a version that supports the higher clock speed, and if the
same cooling is used as on a standard installation at the higher
clock speed to dissipate the heat that is generated at that speed,
the only problems you might see from overclocking are soft errors.
This is because the only Bad Things that really increase on the
CPU when you up the clock speed are current draw and power consumption,
and if the chip in question exists for the higher clock speed, it is
obviously designed to handle that. The reason it is sold as a slower
part is because of variations in manufacturing that makes the
transistors slightly slower, variations that may be offset by
superior cooling or fewer heat sources in the vicinity of the
CPU, allowing a lower operating temperature than called for in the spec,
and consequently higher clock speed.
Mika
>
>Kevin
>
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