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- From: mcrocker@titan.ucc.umass.edu (MATTHEW S CROCKER)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: Replace 486/33 by 486/50-CPU possible?
- Message-ID: <BuMJJp.Csz@nic.umass.edu>
- Date: 15 Sep 92 14:43:01 GMT
- References: <1992Sep11.171833.168@csghsg5a.bitnet> <CARL.92Sep14172902@atlantis.Cayman.COM>
- Sender: usenet@nic.umass.edu (USENET News System)
- Organization: University of Massachusetts, Amherst
- Lines: 43
-
- In article <CARL.92Sep14172902@atlantis.Cayman.COM> carl@Cayman.COM (Carl Heinzl) writes:
- >
- >>Can every 486/33 Computer be upgraded to a 486/50? So is it possible
- >>with every 486/33-motherboard to take out the 486/33-Chip, take out
- >>the crystal (provided it is in a socket), plug in the 486/50Mhz-CPU
- >>and a 50Mhz-crystal to get a 486/50Mhz-Computer or is that not
- >>possible with all systems? If not, why (means, what parts on the
- >>board is the mentioned crystal responsible for)?
- >
- >The answer is a simple *no*.
- >
- >Now, for the more complete answer, here goes. *Many* motherboards can
- >be run at several speeds (25/33/50 Mhz) depending solely on the CPU
- >chip, BIOS, Oscillator, and RAM installed. So, it may be possible to
- >switch the CPU chip and the oscillator and everything will work fine.
- >The BIOS may croak if it has timing loops that must run at a certain
- >speed (but you could always upgrade the bios too).
- >
- >Is it worth it??? Doubtful, especially with all the problems that
- >could crop up. The CPU chip is still the single largest cost item and
- >is roughly 60-85% the cost of the entire motherboard.
- >
- >-Carl-
- >
- >--
-
- You could however take out a 486/33 and replace it with a 486/66DX2
- when they ship (have they shipped yet?).. this will still have a 33 MHz
- bus speed so the BIOS and timer don't care but the Chip runs
- at 66 MHz.... If its worth the money is another matter.
-
- -Matt
-
-
-
-
-
-
- --
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- - Matthew Crocker
- s1949782@titan.ucc.umass.edu <- Til 1/1/93
- mcrocker@titan.ucc.umass.edu <- Til i Graduate LOOOOOOOONNG TIME
-