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P4 heatspreads can explode! (at 4.2ghz)

For those of you whom have been around a while, you would know we were the first to fry a 1GHz T-Bird, the first to smoke a 2GHz Pentium4 Northwood and now it would seem we have added a Pentium4 3.06GHz HT processor to the list. Or does this one count as a "4GHz"?
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Yeah, leading the way in pooch screwing for years now and he's proud of it
rolleye.gif
 
Heh HardOCP, they're like the "Jack Ass" or "Beavis and Butthead" of the PC Enthusiast world......good for a few laughs and slap-stick humor, but still a bunch of idiots at the end of the day.

Chiz
 
Originally posted by: chizow
Heh HardOCP, they're like the "Jack Ass" or "Beavis and Butthead" of the PC Enthusiast world......good for a few laughs and slap-stick humor, but still a bunch of idiots at the end of the day.

Chiz
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nah... they just push things as far(or farther in this case) as any of us O'clockers would push but without the financial repercussions. I know I appreciate seeing these extreme experiments, just I appreciated Thugs and Mikki and others pushing the edge of the FSB envelope on their P4m's.


Self
 
Looks like they might have induced some sort of thermal fracture with the rapid transition from extreme cold to extreme heat? Sort of like throwing boiling-hot water on a frost-covered windshield...
 
I quit going to HardOCP a long time ago when their writing became so horrible that I had to leave. When I clicked on this and saw that Kyle is editing Steve's work I had a good laugh. Laughed even harder when I found in the first paragraph " but you meant to go to go here".

So nice to see that some things never change.
 
Originally posted by: sonoran
Looks like they might have induced some sort of thermal fracture with the rapid transition from extreme cold to extreme heat? Sort of like throwing boiling-hot water on a frost-covered windshield...
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I gotta try that sometime.
 
>Looks like they might have induced some sort of thermal fracture with the rapid transition
> from extreme cold to extreme heat? Sort of like throwing boiling-hot water on a frost-covered windshield...

How about this? The very low temperatures of the Vapochill caused the adhesive to become less flexible. The normal thermal expansion differential between the plastic carrier and the metal heat spreader then broke the bond.

Interestingly, the pictures show that the adhesive does not go all the way around. There is a big gap along one side. This would allow air and moisture to slowly leak in or out. The moisture could have condensed and frozen in the gap, because of the refrigeration, and the expansion of the ice could have popped the spreader off.

HardOC pic of adhesive bond

Anybody notice that the heat spreader is NOT mirror polished, or even smooth looking, where it contacts the chip, and there is no thermal interface material between it and the chip?

If this person was a real enthusiast, he would have used the opportunity to bolt the heatsink directly to the core, like people did with some K6's.

Anybody else pop the tops off their P4s?
 
Intel

Intel designs the heatspreader/die attaching process to withstand lots of heat. HardOCP's dual Vapochil setup provided about a -45 degrees C (-47 F) at the core, which would be at least a -60 C (-76 F) at the heatspreader. The molecular structure of the bonding material first reacted 180 degrees opposite to what it was designed to do. Then violently contracted due to the exteme and quick swing in temperature. The bonding material between the core and spreader simply imploded. That's why you see no material.
 
Originally posted by: Toymaker
Intel

Intel designs the heatspreader/die attaching process to withstand lots of heat. HardOCP's dual Vapochil setup provided about a -45 degrees C (-47 F) at the core, which would be at least a -60 C (-76 F) at the heatspreader. The molecular structure of the bonding material first reacted 180 degrees opposite to what it was designed to do. Then violently contracted due to the exteme and quick swing in temperature. The bonding material between the core and spreader simply imploded. That's why you see no material.
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Very nice post Toymaker! I just wanted to be sure you got some credit for it
😉😎🙂
 
Originally posted by: KF
>
Interestingly, the pictures show that the adhesive does not go all the way around. There is a big gap along one side. This would allow air and moisture to slowly leak in or out. The moisture could have condensed and frozen in the gap, because of the refrigeration, and the expansion of the ice could have popped the spreader off.
Click to expand...

That's completely normal for a P4 heatspreader. They have the hole on the top and the gap in the glue on the side. I bet it's so the pressure stays equalized.

 
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