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Technology Stocks : Advanced Micro Devices - Moderated (AMD)
AMD 203.14-0.8%3:59 PM EST
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To: combjelly who wrote (133671)9/23/2004 11:41:33 PM
From: Pravin KamdarRead Replies (2) of 275872
 
Combjelly,

Having thought about it for another minute, the rate of energy extraction must equal the rate of heat generation, or the temp would rise until meltdown. THe heat flow rate will be dependent on the temperature gradient between the die and the heatsink; die temperature and heatsink temperature being the boundary values. All else being equal, the temp gradient on the 90nm must be greater than that of the 130 nm (due to smaller area). This can occur in two ways: Keeping the case ambient the same would require a higher die temp. Lowering the ambient would give a lower die temp for the same gradient. My guess is that a good heat spreader between die and heatsink, and a slightly lower ambient requirement (better air flow) would give a die temp not much higher than the 130 nm part.

Pravin
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