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- From: ryoung@pollux.svale.hp.com (Roderick Young)
- Date: Thu, 17 Dec 1992 23:47:23 GMT
- Subject: Re: 486DX2 Crystals
- Message-ID: <5150066@pollux.svale.hp.com>
- Organization: Hewlett Packard CPCD, Sunnyvale CA
- Path: sparky!uunet!elroy.jpl.nasa.gov!sdd.hp.com!hpscit.sc.hp.com!hplextra!hpcss01!hpergfg2!pollux!ryoung
- Newsgroups: sci.electronics
- References: <1g4ul8INN2em@violet.csv.warwick.ac.uk>
- Lines: 17
-
- > I purchased a 486 motherboard fitted with a 486DX2 50MHz cpu. Unfortunately
- > with no extra cooling the system fails to complete its bootup proceedure.
- > The board is fitted with 33.3MHz crystal that can be replaced presumably
-
- > to operate however on contacting the supplier he claimed that the crystal
- > frequency didnt matter so long as it is high enough and reckons i need a
- > 50 or 80 Mhz xtal which he is posting to me. Is this assumption correct?
-
- Your supplier seems to be uninformed. You are absolutely right -- get a
- 25 MHz crystal. I assume that you mean a crystal can oscillator, and not
- just a crystal. If someone designed their own oscillator, say, with
- transistors, then it's possible that the oscillator is tuned to some strange
- harmonic, then divided down.
-
- Disclaimer: I don't speak for my company.
-
- - Roderick; HP Personal Computer Division
-