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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Mani1 who wrote (98052)	3/11/2000 9:25:00 PM
From: Ali Chen	Respond to of 1572448

Mani, Intel's <..1 GHz has max junction temp is 60 degrees C !!!!> Yes, this is funny. Someone in the "pool" told me some crazy numbers, that AMD tests Athlons at 90 degrees C plate temperature, sometimes up to 120. Not too shabby, is not it? <1 GHz Coppermine needs ... and a thick copper spreader.> Looks like it really needs it. One time Intel bosses mentioned something like "including liquid phase evaporation technique". I believe they referred to heat pipes encapsulated into the base spreader. Alpha from Japan makes this kind of tricks, far from for free as you may guess... One more thing about the Piii copper heat sink. It may be true that there is no fan attached to it in close proximity. However, several computer makers prefer to use a powerful exhaust fan and an air shroud/duct down to the CPU heat sink. So there IS a forced air convection through those tight spaced fins. So the thread moron may have heard something, but you are right, he has no idea what he is talking about, as usual about any technical matters. However, he has a very good memory about Intel historical stock performance, :) :) Take care, - Ali

To: Mani1 who wrote (98052)	3/12/2000 3:47:00 AM
From: Petz	Read Replies (1) \| Respond to of 1572448

Mani & Ali, Could the limit of 60 degC junction temperature limit in CuMine be because of an off-current leakage problem with the notched gates, especially in the cache? Petz

To: Mani1 who wrote (98052)	3/12/2000 2:26:00 PM
From: Charles R	Read Replies (1) \| Respond to of 1572448

Mani, <According to here---http://developer.intel.com/design/pentiumiii/datashts/24445206.pdf --- 1 GHz has max junction temp is 60 degrees C !!!! This is amazing! A nice fella pointed this out to me by emailing me this post aceshardware.com Very nice post and 100% accurate. The fact of the matter is that 1GHz Coppermine has a much more aggressive thermal design requirement than the 1 GHz Athlon, not to mention much more expensive.> Thanks for the informative post. 60 degrees junction temp! Will be interesting to see what Paul has got to say about this. <The fact of the matter is that 1GHz Coppermine has a much more aggressive thermal design requirement than the 1 GHz Athlon, not to mention much more expensive.> Can you quantify the "more expensive" part? Any estimates on the relative costs of cooling 1G Athlons and 1G PIIIs? <1 GHz Coppermine needs the total thermal resistance from the die to air in the case, of less than 0.8 W/C! That is very low. It is only doable with high speed fans and finely bonded (not extruded which is much cheaper) aluminum sink and a thick copper spreader.> This is a two sided story: On one side it shows Intel's desperation to give a perception that it can compete on Mhz basis, the other side is that Intel has the resources to pull all stops to do this kind of stuff. Chuck