Re: Uh Oh ... Newest Nvidia Chips OVERHEAT

On 27/11/2024 19:16, rbowman wrote:

On Wed, 27 Nov 2024 12:46:12 +0000, The Natural Philosopher wrote:
 

Imagine my surprise at encountering 'commercial design' where it was
sufficient if the thing worked between +10°C and +40°C and the customer
did the product testing, in terms of returned items.

 My youthful idealism took a hit with my engineering statistics course.
Much time was devoted to how many widgets have to be tested to insure only
X% are crap, X being determined by the cost of replacing defective widgets
versus the cost of doing it right.
 

It's a very important part of engineering. I once tested 1000 phototransistors to get an idea of the spreads.
It was a perfect bell curve with one end truncated. Except for two. Those were obvious rejects that had slipped through.
Another time I got a panicky call from my boss. PA amplifiers were popping like flies at a very important and well paid gig.
It turned out that on switch-on, the output hit the rails, and a relay had been fitted to stop the loudspeakers blowing up. Shit design. But anyway that put more voltage across the output transistors than they were rated for. 'But it always worked before' I tested all the transistors in stock. The whole batch were only marginally in spec.
(We left the amps powered up for 3 days solid to avoid switching  them on: once connected to a load the voltage sagged enough to be safe)
--
"First, find out who are the people you can not criticise. They are your oppressors."
      - George Orwell