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From: cjdb@midway.uchicago.edu (Charles Blair)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Can you speed up an old 6Mhz IBM-AT to 12Mhz?
Message-ID: <1990Jul14.010804.6146@midway.uchicago.edu>
Date: 14 Jul 90 01:08:04 GMT
References: <6692@vax1.acs.udel.EDU> <57993@bbn.BBN.COM>
Organization: The University of Chicago
Lines: 16

In article <57993@bbn.BBN.COM> sher@labs-n.bbn.com (Lawrence D. Sher) writes:
>[...]  My experience is limited, but I believe it is very unlikely
>that you will be successful at 12 MHz (24 MHz crystal).  The "ISA" bus has a
>practical upper limit of just about 8 MHz.  Even at 8.5 MHz, you may already
>find some intermittent trouble, like in the disk controller.  I wouldn't try
>for more than 8.0 MHz.


My own experience points to 8.2 or 8.3 MHz as the practical upper
limit (I installed a variable speed crystal). I wasn't running the
Rampage board, but the AST Advantage Premium.


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