OT: Weird Hardware Problem

Valeri Galtsev galtsev at kicp.uchicago.edu
Wed May 20 18:16:11 UTC 2020

On 5/20/20 1:05 PM, Tim Daneliuk wrote:
> On 5/20/20 1:02 PM, Valeri Galtsev wrote:
>> Another factor: older CPUs have higher internal voltages. As you know, internal logics, like ALU, run at much lower voltages than those supplied to CPU. Though these are not directly related to external voltages on CPU pins, still... they quite likely will be more tolerant to higher voltage ripple in case of higher internal voltages.
> I hadn't thought of that, but this could well explain the issue.

Yes, theoretician in me likes to explain issues. Though I grew both as 
theoretician and experimentalist. Anyway, every time I am trying to 
bring reason under observed phenomenon, I remember the joke about the 
difference between theoretician and experimentalist:

Experimentalist describes to theoretician his observation, and 
theoretician immediately explains, that it is simple, this is because 
...[and there goes the explanation]

Experimentalist then tells, oh, wait a moment I made a mistake in my 
description, and what I actually observed in a opposite to what I've 
said. And theoretician immediately replies: Oh, then it is even 
simpler,... [and gives new explanation].

I'm glad you fixed your equipment.


Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247

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