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- From: exuptr@exu.ericsson.se (exuptr@exu.ericsson.se)
- Newsgroups: comp.sys.ibm.pc.hardware,comp.arch
- Subject: Re: Does a 487sx shut down the 486sx??
- Message-ID: <exuptr.395.714848266@exu.ericsson.se>
- Date: 26 Aug 92 16:57:46 GMT
- References: <IeYSMJK00Voz8Vf8ZN@andrew.cmu.edu> <1992Aug19.155448.18248@ilinx.wimsey.bc.ca> <1992Aug19.231651.12970@wam.umd.edu> <26#n0bc.parag@netcom.com> <1992Aug24.202205.26297@crd.ge.com>
- Sender: news@exu.ericsson.se
- Organization: Ericsson Network Systems, Inc.
- Lines: 42
- Nntp-Posting-Host: exupc236.exu.ericsson.se
-
- In article <1992Aug24.202205.26297@crd.ge.com> davidsen@ariel.crd.GE.COM (william E Davidsen) writes:
- >From: davidsen@ariel.crd.GE.COM (william E Davidsen)
- >Subject: Re: Does a 487sx shut down the 486sx??
- >Date: 24 Aug 92 20:22:05 GMT
-
- >In article <26#n0bc.parag@netcom.com>, parag@netcom.com (Parag Patel) writes:
- >| mts@wam.umd.edu writes:
- >|
- >| > Thats why you save your money and buy an overdrive chip instead of the
- >| >487sx. Should plug into the same socket on most so you not only get the full
- >| >486DX, you get it at double the speed.
- >|
- >| And possibly melt your motherboard and/or CPU, which is what someone did
- >| who plugged in the 486DX2 into a notebook designed for a 486SX (I
-
- >The SX and DX2 are not pin compatible, that may help explain the
- >problem. I believe the Overdrive chip /is/ SX pinout. I have no idea
- >what made Intel think a new pinout was remotely a good idea, they could
- >have just left off the FPU.
-
- It is not a new pinout. The DX2 shares pinouts with the DX, which makes
- sense. Think of the Overdrive as an SX2, as far as pinout is concerned.
-
- >DX2 chips use less power than the DX chips of the same (internal) speed,
- >because they don't drive the bus as fast. How much less power is
- >something someone with the spec sheets will have to provide, but unless
- >my memory is completely wrong it's quite a bit.
-
- According to Intel's 241245-001, the Power Supply current is 1200 mA for the
- 66 MHz DX2 and 950 mA for the 50 MHz DX2.
-
- It's also marked "PRELIMINARY" all over the book.
-
- Also of note is the 50 mA rating for supply current in "Power Down Mode".
- It further states this is a target value and has not been tested.
- ----------------------------------------------------------------------------
- "This must be Thursday. I never could get the hang of Thursdays"
- - D Adams
- - Patrick Taylor
- Ericsson Network Systems
- exuptr@exu.ericsson.se "Don't let the .se fool you"
- alternately, exuptr@ZGNews.Lonestar.Org
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