Re: Overclocking VAXen

From: Antonio Carlini (arcarlini_at_iee.org)
Date: 05/23/03 

Date: Fri, 23 May 2003 20:42:58 +0100

JF Mezei wrote:
> But wasn't Digital fairly conservative with the speeds of its CPUs ?
>
> For instance, for the microvax II, would Digital have pushed the limit of the
> chip's speeds, or would it have been satisfied with a .9 VUP speed that
> wouldn't compete against bigger vaxes ?

In the case of the uVAX II, I think the CPU ran at just the
right speed to match the memory interface. Maybe other
systems could have been sped up a little. If you go back
to the older, larger systems, such as the VAX-11/780 and
the VAX 8600, you could run the clock up to about 5%
faster to try and flush out marginal components. (And I
think you could margin the voltages too...)

Antonio 

-- 
--
---------------
Antonio Carlini             arcarlini@iee.org

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