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Old 9th October, 2006, 08:46 AM
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Discussion for CPU burn-in

Here at XtremeSystems is the main thread where I started posting.
It includes tutorials about CPU Stretcher etc...
I would like to discuss with you your impressions.
Thanks in advance.
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Last edited by MrSeanKon; 10th October, 2006 at 08:14 AM.
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Old 9th October, 2006, 11:05 AM
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where?
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Old 10th October, 2006, 08:15 AM
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GKR
LOL!!!!!!!!!!!!
Before completing my post LOL local electricity broken down for a couple of hours!
Sorry men!
Link works in previous post!
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Old 10th October, 2006, 04:52 PM
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"Burn-In" works for a couple of reasons.

On current cpu's, there's a heatspreader. Under this chunk of metal is some sort of Thermal Interface Material. As this material gets hot, it softens, and penetrates into the cracks and crevices of the IHS, making contact between teh cpu and the IHS better. SO, running a cpu @ high temps facilitates this process.

This is even more apparant, at least in my own "experiments", with cpu's that are soldered, rather than simply having a paste-based TIM.
These cpu's need higher temps in order to soften the solder, and thereby benefit more from "burn-in".


I've also experimentsed with no-IHS cpu's...tossing them in the oven, and slowly raising temps, 1 degree @ a time(or that's what I had hoped for, but my oven does not have such "granularity"). In this instance, you can create better contact between the actual silicon core, and the pcb it's mounted to, by softening the solder attaching the two devices. Thankfully, because of surface tension, worries about shorting out the cpu are minimal, as long as temps don't get too high.


Your process, MrSeanKon, aids these processes. As you run through your test, trying to find a max, the cpu heats up....blah, blah, blah. This is why results must be obtained with a new cpu, and not an older one...the thermal interface material or solder has already been stressed, and can only flow into so many places.


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Last edited by cadaveca; 10th October, 2006 at 04:53 PM.
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Old 12th October, 2006, 08:19 AM
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Very technical presentation cadaveca!
Well in 5th page of XS thread fakhrain asked about this but I had a different opinion than yours.
LOL since my SanDiego did not gain anything of burn-in LOL I will stretch him with very high temperatures!
LOL data corruptions are coming LOL.......
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