Charles Houghton-Webb wrote:
jimoase wrote:
Charles Houghton-Webb wrote:
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The other thing that bothers me about stress testing my newly repaired machine is if the stress test DOESN'T break it !
I would have, all told, just given my "like new" computer, a hammering for nothing!!
True if "for nothing" includes finding out " the stress test DOESN'T break it !" in lieu of the stress test does break it.
Computers aren't exactly like batteries, where a certain amount of use will render than unusable.
You are certainly right… to a point It's a fact that electronic parts age faster when running hotter. That's why so much effort is made to keep parts cool.
Apart from any electronics pros and cons discussions, which won't advance things much, from a purely practical point of view, how many things do you buy, and immediately go test its breaking point.
When my MBP gave up 4 months ago, I opted to put it aside in the hope of a future repair plan from Apple, and just replace it.
The 15" retina that replaced it was just put into service normally, doing what I always did with my computers before. I did not attempt to see if it would smoke if I stressed it out. Was that unwise of me ? I think not
Now my 17" has gone in for repair, under Apple's warranty programme. I trust that Apple will repair it correctly and that I'll get the usage I would have hoped for from this machine. Is that really naif of me ? Maybe… perhaps I'm getting soft in my old age
If you do what you have always done are you expecting your new system to operate about the same as your old system, which died 4 months ago and was replaced by the newest system available? Or do you have some criteria for acceptable performance below which is unacceptable?
We know electronics parts have a long life operating temperature range, beyond that range, as a function of time, the parts begins to degrade exponentially. Apple designs there machines to stay within that long life range by using temperature sensors and fan RPM sensors. When temps get too high for safe operation the machine shuts off. When the fan speed gets too high the machine shuts off or an if any combination of temp and fan speed get outside the safe operation envelop the machine shuts off.
Therefore if those safe sensors are functioning properly and the software algorithm is appropriate the likely hood of stressing the machine beyond safe operation is very low.
So far there have been no reports on this discussion of safe guard protections failing. There have been reports of the thermo paste failures and GPU connection failures happening within the normal operation range. There have been discussions that suggest that heat/cooling cycles maybe the kind of operation that stresses the machine sufficient to fracture solder connections and can be repaired with "re-Flow". There have been reports of needing a second reflow suggesting that the mechanical characteristics of the solder is critical to a long operation life.
So like when buying any machine the operator is wise to test it for proper operation before the warranty expires. Kind of like taking your hands off the wheel and slamming the brakes on. Nice to know if the brakes will work appropriately when you really need them.