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======================  Forwarded, at the author's request =====================

Date: Tue, 12 Jan 93 17:31:27 -0500
From: stretch@emunix.emich.edu (Brian Stretch)
Message-Id: <9301122231.AA27017@emunix.emich.edu>
To: blean
Subject: Re: Run a 486/33MHz CPU at 40 or 50MHz?
Newsgroups: comp.sys.ibm.pc.hardware
In-Reply-To: <up47198@zola.esd.sgi.com>
References: <1993Jan8.100550.9995@ac.dal.ca> <1993Jan8.172942.7869@news.clarkson.edu>
Organization: Eastern Michigan University
Cc: 

In article <up47198@zola.esd.sgi.com> you write:
>Are DX2's as push-able ad DX's?  I.E. would you be likely to be able to
>successfully raise 33mhz to 40 mhz, and with a DX2-66 have 80mhz internally?
>
I have a DX2-66 system which has been pushed to 76MHz courtesy of a 38MHz 
clock crystal (my dealer didn't have a 40MHz crystal handy) and a PCubid
heatsink/fan ($40, 916-338-1338.  PC Power & Cooling sells a similar device,
see their ads in PCMag & Byte).  It works beautifully.  Zero problems.  My
dealer has done the same thing in his personal system and he too has no
complaints. 

My system is also VL-Bus, using the ATI Graphics Ultra Pro 2meg/68875. 
No problems. 

My dealer has tried pushing most of the 486 line.. 486SX-25's push to 33MHz,
486SX-33's push to 40MHz, 486DX-33's push to 40MHz, 486DX2-66's push to 
80MHz, but 486DX2-50's stopped being pushable upon introduction of the 
DX2-66, and 486DX-50's won't push, period.  Mind you, _always_ use a 
heatsink/fan combination device when pushing CPUs!  If you don't mind risking
voiding your warranty and digging up the right clock crystal, pushing your
CPU a notch is definitely something to consider.  (Note that my dealer only
pushes CPUs on customer request, it is far from normal business practice). 

Feel free to copy this message onto comp.sys.ibm.pc.hardware--I lack public
posting access at this site. 
- - -- 
"The way I see it, you never know if people are going to believe the truth or a
 lie, so I stick with the truth for the sake of consistency."  --Me
 Brian Stretch (stretch@emunix.emich.edu)  CIS: 76176,1216