Article View: comp.sys.intel
Article #1358Re: Power output/usage of an Intel 386DX (at any clock rate)
From: Bruce Erickson
Date: Mon, 04 Jan 1993 14:42
Date: Mon, 04 Jan 1993 14:42
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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
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Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!sdd.hp.com!col.hp.com!hplsdrn 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