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From: ong@d.cs.okstate.edu (ONG ENG TENG)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Change clock speed on 386SX motherboard?
Message-ID: <1991Jan5.192547.20804@d.cs.okstate.edu>
Date: 5 Jan 91 19:25:47 GMT
References: <1991Jan5.040434.15650@d.cs.okstate.edu>
Organization: Oklahoma State University
Lines: 29

From article <1991Jan5.040434.15650@d.cs.okstate.edu>, by ong@d.cs.okstate.edu (ONG ENG TENG):
> As I mentioned before, just got a 16MHz 386SX.  In the manual, it seems 
> to be saying that the same motherboard (merely refered to as NEATsx
> motherboard, manual prepared by a technical documentation company) can
> be used as a 16MHz or 20MHz.  Can it be true that I merely has to
> change the CPU from a 386SX-16 to a 386SX-20 and speed the RAM
> up appropriately, add the 40MHz oscillator (for the 20MHz CPU, as 
> mentioned in the manual), and I have a 20MHz 386SX.  Does anyone
> has any actual or near-actual knowledge about this?  Or even
> educated speculations?  
> 
> Does anyone know the price of a 386SX-20 off the market?  How about
> trading-in the 386SX-16?  I have seen price for some motherboard
> selling without CPU, but no price for the CPU itself. 

Since I got a few e-mails that need followups and also request to
post the result, I am posting this.

I was told thru email that I properly couldn't do it since most
386SX CPU are soldered onto the motherboard (I looked and mine is).  
My question is, is there any remote possibility that the 386SX-16 
will run at 20MHz.  The memory on the motherboard is ready to run at
that speed and my only investment will be the 40MHz oscillator (to
run the CPU at 20MHz), unless of course that might cause some
permanent damage to the motherboard upon failing. 

Thanks in advance.
> 
E. Teng Ong (ong@d.cs.okstate.edu)