Re: Heat-death of the last of the 2-socket/2-cores-each PowerMac G5s that I have access to

I've got two of these units.  My plan is to try and keep one running.
However, I haven't started the running one for over a year.

I don't know if everyone has seen: http://archive.is/v6ziF. It's an archive
of the cooling system rebuild that someone once did.  I attempted it on one
of my units, unfortunately the first attempt was unsuccessful.

Regards,

Rob

On Tue, Jan 12, 2021 at 8:43 AM Dennis Clarke via freebsd-ppc <
[email protected]> wrote:

> On 1/12/21 4:38 AM, Mark Millard via freebsd-ppc wrote:
> >
> >
> > On 2021-Jan-11, at 17:42, Mark Millard <marklmi at yahoo.com> wrote:
> >
> >> The last of the 4-core PowerMac G5s that I have access to now shuts
> >> down for "CPU B0 DIODE TEMP" that "exceeds critical temperature
> >> (90.0 C)" when I try to rebuild/update ports or such. The other
> >> 4-core G5 failed for such reasons in similar contexts a few months
> >> ago.,Interestingly, the two G5s have very different liquid cooling
> >> systems despite the similar time frame for the failures.
> >>
> >> Without the faster G5s, I may just use cross-built world/kernel
> >> material and see if there is a tolerable but minimal set of ports
> >> for supporting boot testing/dump inspection and basic operation of
> >> the slower 2-socket/1-core-each and 1-socket/1-core-each PowerMacs
> >> that I have access to, avoid things like building devel/llvm*
> >> ports that take so long. (I have fairly strong time preferences.)
> >
> > I've done some more testing and, while use as a (full load/speed)
> > builder machine is a no-go, it looks like this 4-core G5 can
> > still be used for boot testing and basic operation without
> > overheating. The prior failing machine overheated more easily
> > but might have a similar status if I test it just for such use.
> >
> > How long the recently failed G5 will be useful for boot and basic
> > operation testing, I do not know. But probably longer than for
> > the originally-failing G5.
> >
>
>
> The shipping cost of a replacement unit would be more money than the
> entire machine itself.  I have four of these units where I keep one
> of them running neatly. I think I have half a dozen more somewhere
> in the back of a warehouse in Toronto.  Back in 2010 ( or earlier )
> they were fantastic CPU powerhouse units running some math crunch
> daemons that I wrote. Also, hard to believe but it was more cost
> effective than running the big SPARC64 units that I had at the
> same time. Ever tried to run Sun/Oracle M4000 or M5000 machines?
>
> In any case please drop me a line off-list and let's see if we can
> figure out a way to get a workable unit into your hands.
>
>
> --
> Dennis Clarke
> RISC-V/SPARC/PPC/ARM/CISC
> UNIX and Linux spoken
> GreyBeard and suspenders optional
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