Author Topic: The AmpHour #43 Cosmic Rays  (Read 1573 times)

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Offline Rufus

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The AmpHour #43 Cosmic Rays
« on: May 19, 2011, 05:53:47 am »
A missed point in the discussion is that while small geometry silicon circuits are much more likely to be 'flipped' they also present a much smaller target. The probability of a particular bit getting flipped has probably gone down significantly with the shrinking dimensions.

As for cosmic ray bit flipping in personal computers I doubt even 1% of flipped bits would show a noticeable effect. Would you notice a single pixel on this page being a bit off colour?

Flipped bit error rates should be easy enough to measure on PCs with ECC memory. I have a server motherboard with ECC. It also has a memory scrubbing option. I never found a way to inspect or log ECC activity.





 


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