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Technology Stocks : Intel Corporation (INTC) -- Ignore unavailable to you. Want to Upgrade?

To: Paul Engel who wrote (135245)	5/16/2001 10:46:05 PM
From: Dan3	Read Replies (1) \| Respond to of 186894

Re: SGI Runs World's First TPC-H Benchmark on Linux I guess now we know why they used 700MHZ PIIIs instead of P4s... Intel has released an article that explains why CPU hot spot thermal throttling is an unavoidable problem for the P4 (or at least for Willamette). Certain parts of the P4 processor core generate so much heat so quickly (under load) so as to result in an instantaneous CPU crash before the heat can be dissipated through the package to the heat sink. For this reason, a thermal diode was integrated into the CPU core in the region of greatest heat generation. When a performance critical task overheats this part of the chip, the thermal diode triggers and initiates unconditional performance throttling (50% or more) under hardware control until the high stress operations finish and the hot spot can cool down. An external temperature sensing circuit could not react quickly enough to avoid a crash. A bigger heat sink or fan cannot directly or completely resolve hot spot thermal throttling. It is hard to call this a ‘feature’, even in quotes. inqst.com