[mythtv-users] Laptop CPU in Desktop Mainboard
rtsai1111 at comcast.net
Wed Jan 25 03:57:29 UTC 2006
On Tue, Jan 24, 2006 at 09:37:24PM +0100, Marius Schrecker wrote:
> > Tom Dombrosky wrote:
> >> On 1/24/06, *Steve Adeff* <adeffs at gmail.com <mailto:adeffs at gmail.com>>
> >> wrote:
> >> On Tuesday 24 January 2006 12:34, Michael Starks wrote:
> >> > I have been thinking of using a laptop CPU to save power on
> >> > a new MythTV system. Basically, I'd like to be able to use
> >> > the cpuspeed daemon to drop the CPU speed when there isn't
> >> > a lot going in. Has anyone done with with a full-size
> >> > mainboard? Any other tips?
> >> laptop CPU's use different sockets, etc. I believe some of
> >> the new mini boards (BTX or something?) use laptop cpu's. I
> >> also believe desktop cpu's support the cpu speed daemons.
> >> The Athlon laptop cpus use the same socket. They will work fine.
> > A really minor modificatio can turn a normal Athlon XP into a
> > mobile athlon too - which enables you to use the athcool stuff
> > under linux. It's pretty straight forward and there's plenty of
> > stuff on doing it out there.
> What about the 64 family, any mods there? I'm using an Athlon 64
> 3700+ San Diego (socket 939) which has pretty good voltage/speed
> stepping, although I'd love to be able to drop the lowest step even
> more. If anyone knows a mod for that I'd love to know! The kernel
> module seems to read the stepping info direct from the cpu or bios,
> and I haven't found a way to manipulate this manually, although
> googling suggests that a further 10% cut in voltage should be
How slow are you trying to go?
I have an Athlon64 3500+ Winchester. By default, the cpufreq-ondemand
governor only lets it go from 2.2GHz down to 1.8GHz. I had to tweak it
manually to drop it down to 1.0GHz (nothing available in between):
# cpufreq-set --min 1000000 --governor ondemand
[This is software only; no mucking around with voltage on the
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