AVSIG: Time sink! wwswsigarch.jpg (7236 bytes)

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Russell Holton
AVSIG Member


Reged: 07/07/05
Posts: 14136
Re: Time sink!
      12/25/15 03:40 PM

Quote:

Notice there are no more Crays.




Too big.

IIRC, the Cray's unique shape was to reduce the distance from the ends so the signal could get from one end to the other quicker.

But modern PCs have a clock speed of around 3GHz. At 3GHz, light (or a clock signal) only travels about 4 inches. Lots of luck clocking anything the size of a Cray that fast. In fact, I think only the CPU in a PC runs that fast. The RAM and other buses run at a slower speed.

Notice that improvements in computing speed seem to come from multi-core. (Dual-core, Quad-core, Octa-core) We seem to have hit a wall on clock speeds. (Although the speed of the various buses have a big effect as well.)

(The clock speed of the original PC was 4.77 MHz. - light travels 200+ feet in a clock pulse.)

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Entire topic
Subject Posted by Posted on
* Time sink! Russell Holton 12/23/15 07:13 PM
. * * Time sink! Ray Tackett   12/23/15 10:18 PM
. * * Re: Time sink! Terry Carraway   12/24/15 05:48 AM
. * * Time sink! Ward Miller POU-NY   12/23/15 10:10 PM
. * * Re: Time sink! Terry Carraway   12/24/15 05:50 AM
. * * Re: Time sink! Russell Holton   12/24/15 12:49 PM
. * * Re: Time sink! Terry Carraway   12/25/15 06:16 AM
. * * Re: Time sink! Russell Holton   12/25/15 03:40 PM
. * * Re: Time sink! sreyoB yrraL   12/25/15 08:45 PM
. * * Re: Time sink! Ralph Jones   12/25/15 04:11 PM
. * * Time sink! Ray Tackett   12/25/15 05:03 PM
. * * Re: Time sink! Mase Taylor   12/25/15 05:49 PM
. * * Time sink! Ward Miller POU-NY   12/25/15 09:42 PM
. * * Re: Time sink! Russell Holton   12/26/15 03:57 PM
. * * Re: Time sink! John O'Shaughnessy [FCM]   12/26/15 03:16 PM
. * * Time sink! Ray Tackett   12/25/15 10:51 PM
. * * Time sink! Ward Miller POU-NY   12/26/15 11:19 AM
. * * Re: Time sink! Ralph Jones   12/26/15 12:30 PM
. * * Re: Time sink! Ralph Jones   12/25/15 09:37 AM
. * * Time sink! Ward Miller POU-NY   12/24/15 05:36 PM
. * * Re: Time sink! Russell Holton   12/24/15 06:10 PM
. * * Re: Time sink! Terry Carraway   12/25/15 06:19 AM
. * * Re: Time sink! Mase Taylor   12/25/15 11:01 AM
. * * Time sink! Ward Miller POU-NY   12/25/15 11:59 AM
. * * Re: Time sink! Ralph Jones   12/24/15 02:01 PM

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