I was reading an article over a RealWorldTech.com on the presentation that Intel gave at ISSCC a few weeks ago, and I saw that they posted up a screenshot of a "shmoo plot" which is output of one of the debug testers showing how the pass/fail boundary of a CPU changes as you change voltage and frequency. I thought that this might be of interest to people on this forum since it illustrates graphically something that people on this forum already know but may not have seen in this format before.
The graph is here: http://www.realworldtech.com/page.cfm?ArticleID=RWT021906030756&p=4
Green is, obviously enough, a passing point for the CPU. Red is obviously enough, a failing point. As you can see, increasing voltage increases the passing frequency for the part.
I see people talking about changing the voltage and it's effect on frequency and thought that people here might be interested in what the industry tester outputs look like graphically for these two parameters.
And, I'll add my standard comment that overvolting dramatically reduces the operational lifetime of a microprocessor - there's a reason why companies don't ship parts at higher voltages. Be careful and be aware that operating outside the specification can cause system instability and, if you increase the voltage, lead to early processor failure.
The graph is here: http://www.realworldtech.com/page.cfm?ArticleID=RWT021906030756&p=4
Green is, obviously enough, a passing point for the CPU. Red is obviously enough, a failing point. As you can see, increasing voltage increases the passing frequency for the part.
I see people talking about changing the voltage and it's effect on frequency and thought that people here might be interested in what the industry tester outputs look like graphically for these two parameters.
And, I'll add my standard comment that overvolting dramatically reduces the operational lifetime of a microprocessor - there's a reason why companies don't ship parts at higher voltages. Be careful and be aware that operating outside the specification can cause system instability and, if you increase the voltage, lead to early processor failure.
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