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Technology Stocks : Apple Inc.

AAPL 259.48

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Jan 30 9:30 AM EST

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To: Richard S. Schoenstadt who wrote (487)	12/8/1996 10:55:00 AM
From: Bill Fischofer	of 213183

Re: Exponential The major problem with bipolar technology is the heat. According to the Byte article you mention, the X704 will radiate between 75-85 watts. That's an enormous challenge for a system designer. Remember that IBM used to use bipolar technology in its water-cooled mainframe processors. Even the so-called "air cooled" versions used air as a secondary coolant to an internal water cooled system. High heat output's main effect is system reliability. You also need a very sophisticated internal thermal control system which will shut things down in a hurry if problems arise. Bipolar designs can literally melt down on coolant failures--not the sort of thing you want happening with a $1000 chip. Keep on eye on them, but don't underestimate the challenges they face in producing real-world systems based on this chip.

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