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Intel and AMD thermal protection : the movie

By Betcour in MLP
Tue Sep 18, 2001 at 07:38:23 AM EST
Tags: Technology (all tags)

Tom's Hardware german team has tested 4 processors thermal protection (Pentium III and 4 and Athlon and Athlon/Palomino). The test involves removing the heatsink of each processor while running Quake III and see what happens... the video (DivX) of the test is available and is very impressive to say the least.

[editor's note, by rusty] The English version is also available.


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o the video (DivX)
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Intel and AMD thermal protection : the movie | 10 comments (5 topical, 5 editorial, 0 hidden)
For those that don't read german... (5.00 / 1) (#3)
by Volta on Mon Sep 17, 2001 at 11:39:25 AM EST

The article is on the english site now :
How Modern Processors Cope With Heat Emergencies

Ouch (4.00 / 1) (#5)
by Anonymous 242 on Mon Sep 17, 2001 at 02:17:27 PM EST

And I just bought an Athlon.

I hope that AMD learns from this.

OTOH, how often do heat sinks actually fall off? I know the Tom's Hardware folks mentioned running into this problem, but how common is it for people that aren't in a test lab, swapping out, tweaking, and examining processors all the live-long day?


Lee Irenæus Malatesta

Not very (5.00 / 1) (#6)
by fluffy grue on Mon Sep 17, 2001 at 10:58:44 PM EST

All socketed CPUs since the original Pentium have a nifty little restraining clip thing which makes it so that the only thing which will cause a heatsink to fall off would probably have destroyed the CPU already.

On slotted CPUs, the heatsink is typically screwed on. It could work its way loose with a lot of vibration, but that vibration would likely have long since pulverized everything inside your case anyway.

spontaneous heatsink removal is a pretty good simulation of what happens when a peltier cooler suddenly dies, though.
"Is not a quine" is not a quine.
I have a master's degree in science!

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[ Parent ]

Heat sinks (none / 0) (#8)
by sigwinch on Mon Sep 17, 2001 at 11:09:33 PM EST

OTOH, how often do heat sinks actually fall off?
If it happens to the computer you rely on, 100%.

Frankly I cannot comprehend why they don't fix it: put a self-timed oscillator on the edge of the die near a (cooler) bond-out pad, and put another oscillator in the middle of the chip next to (hotter) core logic. The frequency of self-timed silicon oscillators depends on their temperature; the frequency difference between two depends on the temperature difference. Comparing the two frequencies is easy: just takes two counters. If the difference is too large, turn off the clock and the power dissipation drops to almost nothing. It would only take few hundred transistors. The DS18B20 temperature sensor uses a variation on this technique (last time I checked).

I don't want the world, I just want your half.
[ Parent ]

As Tom's say it (none / 0) (#9)
by Betcour on Tue Sep 18, 2001 at 02:51:40 AM EST

Actually it is common when the PC is shipped that the heatsink fall off. Having what is sometimes a 500 g heatsink attached to the socket thru tiny plastic and metal hook is not a very good solution.

On the other hand it doesn't happen with Pentium 4 processors as Intel requires that all heatsink be screwed to the motherboard, hence the heatsink can't go away no matter what. On AMD systems this system is optionnal (most socket A motherboards have the 4 holes around the socket for this, but few heatsink actually use them)

[ Parent ]
Intel and AMD thermal protection : the movie | 10 comments (5 topical, 5 editorial, 0 hidden)
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