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The Report of My Thermal Death Have Been...
A reader writes "Not too long ago, Tom's Hardware posted a video of the grisly events that take place when the heatsink is removed on an AMD Athlon MP 1.2GHz in an attempt to show that the chip has inadequate thermal protection unlike the Pentium 4. Apparently, this is not the case. This new video, which looks like was done by AMD, shows the system continuing to work when the heatsink is removed. Even 9 minutes of Quake3 without the fan operating wasn't enough to destroy the processor. So who is right? It's in AMD's best interest to show that their product doesn't disintigrate under extreme conditions. " Update: 10/30 14:11 GMT by H : Note that it was Terry 'quad3d' Wang that actually did the video - not AMDZone.
All this shows is a motherboard with sufficent onboard temperature monitoring, shutting down because the CPU is over heating. It has nothing to do with the CPU having any sort of built in temperature throttle like the P4 has (or even the 68040 had). Tom's Hardware and this video are showing two completely different and seperate things. One shows how a motherboard reacts in order to save an amd cpu (this current video), and the other shows what happens if the cpu is left to cope with a heat problem on its own (Tom's tests) without the motherboard stepping in to rescue it.
/. just doesn't care some days... or maybe its just on slow days ;).
I wish people would at least FILTER some of these posts. Its seems that
No, Tom's results show that when the heatsink is removed, the blue smoke gets out. The AMD video shows the machine shutting itself down. The differences is that the Intel processors simply slow way down, but keep running.
AMD's test is apparantly usings a thermal shutdown sensor, which shuts the power down when the CPU gets too hot. Not all motherboards have those, and they can be disabled in software. Intel processors apparantly have a similar function built-in.
I work for a local computer shop, and although we are no Dell or Gateway, we've seen a lot of weird hardware stuff over the years.
And the fact of the matter is that AMD CPUs can really burn up just like in Tom's Video.
We've seen more than once, a customer coming back with what he said was a defective AMD CPU, and when we check the CPU, we could see the adhesive barcode that we put on the underside of each, partially burned out !
And don't get me started on the damn fragility of those AMD CPU, we've got dozens of them broken because some guy slipped when installing a fan on them.
Murphy
The video demonstrates an AthlonXP processor. Tom was testing the "pre-XP" version. This leads to a VERY unfair comparison...Tom directly mentions that the XP will use the same core that the dual-capable Athlons do...this core does have built in temperature management. The Pre-XP processors DID NOT and WOULD FRY if left unhelped. This doesn't demonstrate that Tom's test was wrong or his results invalid...this shows that AMD knows they screwed up but were at least smart enough to fix the problem in the next significant rev of the chip (though that doesn't fix the situation for those of us with Pre-XP chips)