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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!usc!elroy.jpl.nasa.gov!insctrl.jpl.nasa.gov!RFowler
- From: RFowler@kelvin.jpl.nasa.gov (Robert A. Fowler)
- Subject: Re: 486/50DX and 486/33DX: P5 Upgradable?
- Message-ID: <RFowler.284@kelvin.jpl.nasa.gov>
- Summary: One piece left out..
- Sender: news@elroy.jpl.nasa.gov (Usenet)
- Nntp-Posting-Host: insctrl.jpl.nasa.gov
- Organization: Jet Propulsion Laboratory
- References: <1992Jul14.154958.9913@cs.tcd.ie> <BrnLqE.6z5@mudos.ann-arbor.mi.us> <1992Jul20.125911.10042@scott.skidmore.edu> <12@zeos.COM>
- Date: Tue, 21 Jul 1992 13:54:20 GMT
- Lines: 32
-
- In article <12@zeos.COM> kgermann@zeos.COM (Ken Germann) writes:
-
- >In article <1992Jul20.125911.10042@scott.skidmore.edu>, pvonk@scott.skidmore.edu (Pierre VonKaenel) writes:
- >> In article <7@zeos.COM> kgermann@zeos.COM (Ken Germann) writes:
- >> >
- >> >But, if you are not in direct need of that kind of computing power. I would
- >> >hold off and buy a 486-33 motherboard. The reason behind this is because
- >> >the DX2-66 will run faster than the DX50. Most 486-33 motherboards have a
- ^^^^ ^^
- >> >66Mhz Oscillator already on them
- ^^^^^^^^^^^^^^^^^
- No, *ALL* 33MHz i486-33 montherboards have a 66MHz occilator, becuase normal
- Intel CPUs (80x86) require a 2x clock. So to run at 33MHz it needs to be
- suplied with a 66Mhz clock. The DX2 CPUs will run on a 1x internal clock,
- there for a 66Mhz DX2 needs a 66MHz occilator, not a 132Mhz one.
-
- ObWarning: Make sure that there is a 100Mhz crystal on that i486-50
- motherboard you just got, (if it's a 50Mhz one, you just got ripped off,
- and you have a 25MHz computer).
- _________________________________________________________________
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