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Date:      Sat, 9 Nov 2013 01:25:39 -0800
From:      Adrian Chadd <>
To:        Warren Block <>
Cc:        Dan Nelson <>, FreeBSD Mailing List <>, aurfalien <>
Subject:   Re: CPU Turbo mode
Message-ID:  <>
In-Reply-To: <>
References:  <> <> <> <>

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On 8 November 2013 16:08, Warren Block <> wrote:

> When it shows 2201, it's in Turbo mode.  I don't know if there is anywhere
> that shows the actual speed of the single core that is going faster.

I enabled this on a 4-core sandy bridge (E3-1260L IIRC) and all four
cores suddenly grew a few % more clock cycles. But, it was on a server
whose fans are cranked high anyway, so the CPU temperature only grew a
degree or two.

I think Turbo Boost is boosting all cores that have work on it; it's
up to the thread/process scheduler to keep the thermal envelope such
that the overclocking works.


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