Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!samsung!usc!ucsd!ucbvax!hplabs!hp-pcd!hpvcfs1!johne
From: johne@hpvcfs1.HP.COM (John Eaton)
Newsgroups: comp.sys.ibm.pc
Subject: Re: BEWARE OF SAI SYSTEMS IN SHELTON, CT
Message-ID: <670020@hpvcfs1.HP.COM>
Date: 22 Nov 89 20:57:06 GMT
References: <6268@tank.uchicago.edu>
Organization: Hewlett Packard, Vancouver, WA
Lines: 15

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< Recently i opened it to put in a 287 and saw that they use a SUNTAC 12Mhz
< board with a 10Mhz cpu. I had noticed a minor performance difference with my
---------
A 10 mhz CPU will normally be speced at 0 to 70 C and +-10% VCC. If you under-stand the speed derating and can guarentee a tighter environment then you can run
the part faster. 

It is common for a chip maker to characterize the speed vs temp for a part
so that they can test the parts at room temperature and a faster clock. That
way the know it will work at the extremes.  


John Eaton
!hpvcfs1!johne