Date: Sun, 18 Jan 2004 14:57:59 -0800 From: "David O'Brien" <obrien@FreeBSD.ORG> To: Adriaan de Groot <adridg@sci.kun.nl> Cc: freebsd-amd64@FreeBSD.ORG Subject: Re: CPU throttling Message-ID: <20040118225759.GL65333@dragon.nuxi.com> In-Reply-To: <Pine.GSO.4.44.0401182352350.2190-100000@wn4.sci.kun.nl> References: <20040118223144.GH65333@dragon.nuxi.com> <Pine.GSO.4.44.0401182352350.2190-100000@wn4.sci.kun.nl>
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On Sun, Jan 18, 2004 at 11:55:06PM +0100, Adriaan de Groot wrote: > On Sun, 18 Jan 2004, David O'Brien wrote: > > On Wed, Jan 14, 2004 at 03:41:16PM -0600, James Van Artsdalen wrote: > > > Is CPU throttling possible with AMD64? > > > > Nope. We don't have a Cool&Quiet PowerNOW driver. > > I had C&Q turned on in the BIOS of my Asus k8v, AMD Q&Q(tm) is something different than what your mobo is doing. C&Q controlls VID/FID (p-state) changing. One needs a driver for it. > and coupled with the > zalman 7000cu cooler, the behavior was as follows: > > 0) at boot, spin fan at 2500rpm for 5min > 1) shut off fan entirely (damn frightening!) > 2) wait for CPU temp. to reach 50 degrees > 3) switch on fan at 2500rpm > 4) wait for CPU temp. to reach 30 degrees > 5) goto 1 Yes, this is simply the mobo running the fan at the slowest speed that will keep the CPU w/in vendor specified operating temps.
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