[linux-audio-user] CPU clock - beware

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On Fri, 2004-07-23 at 19:27, tim hall wrote:
> Ah,
> 
> I just re-read your mail and then re-read my motherboard manual.
> So I'm running with an effective fsb of 66.8MHz [penny]
> That's what I get with the default settings of JP29 & JP23 on the motherboard 
> [duh] If I was to jumper them at, say 5-6 & 3-4 respectively, this would give 
> me host clock 3x (100 - 124MHz) [er] which I assume would then show up in the 
> BIOS? [oh] could I then set it to the specified 100MHz x 6 ?:-]
> I assume that's what my system would prefer.
> [ps] One day I might get the hang of this hardware stuff. [clunk]
> 
> I realise this is probably elementary stuff for most of you.
> It's a flippin' revelation for me :-)
> 
> Little note for Steve Harris:
> If I'm right, this means I've been successfully running JAMin on a severely 
> _underclocked_ Celeron 600, so stick that in your minimum system 
> requirements ;-]

Wow! I luv JAMin. But it makes my Athalon XP 2500 with 512MB RAM break a
sweat when I run it with Ardour. :)

R~
> 
> thanks for your patience & assistance.
> 
> tim hall
> 
> Last Saturday 24 July 2004 01:42, I went:
> > Last Friday 23 July 2004 22:32, Rick B was like:
> > >        Yes, I would think that you would notice a big difference. If
> > > before adjusting you had a 66.8mhz fsb x 3.5 multiplier = 233.8mhz and
> > > after you have a 66.8mhz fsb x 8.0 = 566mhz.
> >
> > Great, thanks for confirming that.
> >
> > > You might want to check and
> > > see if you have a fan on your cpu (I have a 566mhz that doesn't), if not
> > > and you do notice instability adding one would probably fix it. Also if
> > > you dont have a fan now, adding one for $10 is a cheap way to  overclock
> > > it.
> >
> > I do have a fan on it, although I could probably fit a bigger quieter one
> > in. I'm not interested in overclocking as such, just getting the
> > straightforward best performance.
> >
> > > I'm wondering though, where does the 100mhz fsb you mentioned come
> > > in? You will either have a 66.8mhz fsb times a multiplier or a 100mhz
> > > fsb times a multiplier
> >
> > These fluffy figures probably come from my misunderstanding of the manual.
> > CPU Freq: 600MHz
> > CPU Ratio: 6x (?)
> > CPU FSB: 100MHz
> > It also says: Warning: Intel 810/810DC-100 chipset supports a maximum of
> > 100MHz CPU FSB blah ...
> > I think from the jumper settings that the display cache runs at the same
> > speed, there's nothing to suggest there's any value in pushing it.
> > So far I'm not seeing any instability, so I'll stick with this and see how
> > it goes.
> >
> > >         As far as memory goes, I think most people that read this list
> > > would agree that you can never have to much. When you run out of
> > > physical ram and have to swap to disk it slows the machine waaayy down
> > > (and causes dropouts).
> >
> > And dropouts, right. This is now my biggest (but not insurmountable)
> > problem, which can obviously be fixed by throwing some cash at it when I
> > get some. That's a Win AFAIC :-)
> >
> > Thanks for increasing my understanding of this subject.
> >
> > tim hall
> 


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