Date: Tue, 12 Jan 2021 16:42:38 +0000 From: Dennis Clarke <dclarke@blastwave.org> To: freebsd-ppc@freebsd.org Subject: Re: Heat-death of the last of the 2-socket/2-cores-each PowerMac G5s that I have access to Message-ID: <563ef275-97b0-3026-1073-ff715c9cecd7@blastwave.org> In-Reply-To: <B38F1AF4-B63F-440C-A07A-0B81D25112EA@yahoo.com> References: <27E8A3B1-7278-464E-A284-0B294337B3DA@yahoo.com> <B38F1AF4-B63F-440C-A07A-0B81D25112EA@yahoo.com>
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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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