Re: searching for a wide alpha cpu heatsink (2nd request)

[Alexander Huemer <alexander huemer sbg ac at>]

Michael Kronsteiner wrote:
> Hello :)
>
> I have an intel- boxed cooler at hand (including fan, the round one) might this be big enough to fit your cooling needs?
>
> best regards
>
> Michael
> -------- Original-Nachricht --------
>   
> > Datum: Tue, 11 Nov 2008 15:35:13 +0100
> > Von: Alexander Huemer <alexander huemer sbg ac at>
> > An: Linux on Alpha processors <axp-list redhat com>
> > Betreff: Re: searching for a wide alpha cpu heatsink (2nd request)
> >     
>
>   
> > Hoover, Tony wrote:
> >     
> > > Interesting.  All my LX's and SX (and even my EB64+, back in the day)
> > > all had 3 wire fans.  I thought it was required.  IIRC, You could use a
> > > PC fan, but you have to switch the power and tach lines (I think, check
> > > pin-outs before taking my word on that).  I remember that I did re-wire
> > > a PC fan for one of my alphas.
> > >
> > >
> > > I guess if you have something to generate psuedo-tach pulses, you could
> > > passively cool an alpha (with a large enough heat-sink).  I'll  be
> > > interested in hearing the outcome.
> > >
> > > If you know a machinist, you could have him build a heat sink for you
> > > out of a block of aluminum.  Remember, surface area is the key, so use a
> > > small mill to make lots of fins.
> > >
> > >
> > > Good luck
> > >
> > > T
> > >
> > > On Mon, 2008-11-10 at 17:59 -0500, Jay Estabrook wrote:
> > >   
> > >       
> > > > Hi, Tony,
> > > >
> > > > He's looking to do this to an LX164, and mine only has a 2-wire fan,
> > > > so I think it may be OK?
> > > >
> > > > --Jay++
> > > >
> > > > Hoover, Tony wrote:
> > > >     
> > > >         
> > > > > You still have to have a fan.  Alpha's don't run if it doesn't detect
> > > > > pulses on the tach line for the CPU fan.
> > > > >
> > > > > T
> > > > >
> > > > >
> > > > > On Mon, 2008-11-10 at 18:35 +0100, Alexander Huemer wrote:
> > > > >       
> > > > >           
> > > > > > Marc Schlensog wrote:
> > > > > >         
> > > > > >             
> > > > > > > On Mon, 10 Nov 2008 17:00:18 +0100
> > > > > > > Alexander Huemer <alexander huemer sbg ac at> wrote:
> > > > > > >
> > > > > > >
> > > > > > >           
> > > > > > >               
> > > > > > > > hi,
> > > > > > > >
> > > > > > > > i got some offers from several people here on the list.
> > > > > > > > thanks a lot for that!
> > > > > > > > some people said they wanted to take a look in their basements or
> > > > > > > >                 
> > the
> >     
> > > > > > > > like. so, here is my second request: does anybody have a WIDE alpha
> > > > > > > > heatsink for me?
> > > > > > > > wide means > 5.5cm or 2.2in.
> > > > > > > > ideal would be somethink like
> > > > > > > > http://www.tbcs-online.de/e-bay/CPU/KN610-CA_SMP_1.jpg
> > > > > > > > that should be ~10cm or 3,9in wide.
> > > > > > > >
> > > > > > > >             
> > > > > > > >                 
> > > > > > > What are you trying to do? Turn your LX into a space heater?
> > > > > > >
> > > > > > > _______________________________________________
> > > > > > > axp-list mailing list
> > > > > > > axp-list redhat com
> > > > > > > https://www.redhat.com/mailman/listinfo/axp-list
> > > > > > >
> > > > > > >           
> > > > > > >               
> > > > > > no, i am trying to cool my alpha with less noise.
> > > > > >
> > > > > > _______________________________________________
> > > > > > axp-list mailing list
> > > > > > axp-list redhat com
> > > > > > https://www.redhat.com/mailman/listinfo/axp-list
> > > > > >         
> > > > > >             
> > > > > _______________________________________________
> > > > > axp-list mailing list
> > > > > axp-list redhat com
> > > > > https://www.redhat.com/mailman/listinfo/axp-list
> > > > >
> > > > >       
> > > > >           
> > > > _______________________________________________
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> > > >     
> > > >         
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> > >   
> > >       
> > hi tony,
> >
> > i have a 3 wires too.
> > re-wiring a pc fan is not possible to my knowledge, because the signal 
> > is completely different.
> > a pc wants to have pulses (as you said) so that they can measure the 
> > rotating speed of the fan.
> > the original fan of my alpha (some strange panaflo) gives a certain 
> > voltage on one wire if the fan is turning. when you stop the fan, the 
> > voltage goes up and the alpha stops. when you remove the fan, the 
> > voltage is missing and the alpha does not run either.
> >
> > my "alpha fan simulator" does just provide the required voltage, that's
> > all.
> >
> > building a heatsink from scratch is of course possible, but that's not 
> > the way i want to go, if i find somebody who has a BIG BIG heatsink for
> > me.
> >
> > --
> > regards
> > alex
> >
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> >     
>
>   
thanks for your reply, michael.
i have such coolers too.
since there are two screws sticking out of the cpu die, it would be 
necessary to mill down two times in the heatsink and then drill 2 holes.
since the fins are very thin, they would become heavily damaged during 
that process.
i know that, because i already tried that ;(
unfortunately this is not an option, unless you have a 21164 600mhz cpu 
for me without the screws.

--
regards
alex