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- From: bae@hplsdrn.col.hp.com (Bruce Erickson)
- Newsgroups: comp.sys.intel
- Subject: Re: Power output/usage of an Intel 386DX (at any clock rate)
- Date: 04 Jan 1993 07:42:15 MST
- Organization: Hewlett-Packard Logic Systems Operation
- Lines: 27
- Sender: bnr@hplsdrn.col.hp.com
- Message-ID: <1i9iskINNpm3@hp-col.col.hp.com>
- References: <1992Dec22.041656.8444@kronos.arc.nasa.gov>
- NNTP-Posting-Host: hplsdrn.col.hp.com
-
- In comp.sys.intel, Eric A. Raymond writes:
- > Does anyone have info on the power usage/dissipation of an Intel 386
- > DX at any clock rate (I assume it will scale linearly to the 1st order
- > approx)?
- >
- > I've looked in the big Intel microprocessor source book and couldn't
- > find the answer.
-
- You need to look in the small book (the one with the timing information
- and DC/AC specifications)....
-
- Icc @ CLK2=40MHz: 500mA 2.5W @ 5V
- 50 550 2.75W
- 66 550 2.75W (other specs on the 66MHz part imply
- Intel played games to get this speed, which
- is probably why the power consumption is
- not linear with frequency here!)
-
- I suspect that this specification is with no current loads on its outputs,
- so be sure to include that in your calculations. Note also that the
- PGA package is only specified to run up to 85C with a Case-to-Ambient theta
- of 19 C/Watt -- so you'd better consider a fan and/or a heat sink!
-
-
- - Bruce Erickson
- Hewlett Packard
- bae@col.hp.com
-