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Date:      Wed, 09 Jun 1999 16:13:53 -0400
From:      Tom Embt <tom@embt.com>
To:        jin@george.lbl.gov
Cc:        freebsd-hardware@freebsd.org
Subject:   Re: P-II vs K6-2
Message-ID:  <3.0.3.32.19990609161353.0097b530@mail.embt.com>
In-Reply-To: <199906091946.MAA27296@george.lbl.gov>

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At 12:46 PM 6/9/99 -0700, you wrote:
>Tom Embt (tom@embt.com) wrote
>> I must also defend the Celery 450A  :)
>
>Would you please tell me which farm plants Celery 450A  :) ?

The "450A" doesn't exist as such, it is an unofficial name given to the end
result of overclocking a Celeron 300A to 450MHz.

This gives pretty good success rates, particularly with PPGA style
processors.  Exact numbers are anyones guess but most people seem to think
it's over 75%.  With the price of PPGA 300A's today, it is an extremely
inexpensive way to get approximately P2-450 performance.

As for your lack of luck getting Celerons to 100MHz bus speeds, what speed
chips have you been trying to overclock?  I ask because the average
capability of the Mendocino core (although ever changing) seems to be
around 450-500MHz.  Some are better or worse, but because of this many
333MHz and up Celerons won't hit 100MHz bus because their core can't take
it.  300A's are the natural choice, as their fixed 4.5x multiplier on a
100MHz bus gives a core speed that is obtainable by the majority of chips
(450MHz).

Also, use of a quality motherboard is helpful in overclocking.



Tom Embt
tom@embt.com



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