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  1. #1
    Platinum Lounger
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    G-Flops (Historic)

    The attached composite image shows a photograph of a centre-magazine advertisement I souvenired before 1984.
    I've hung it on my wall for some time, and was especially fond of showing it off prior to 1984, which turned out to be as big a flop as the new millenium.
    The inset shows the fine print - 1.3 GFlops - which seemed fast for those days, even if i scrape up my transistor and nand/nor logic gates of many many years ago.
    Today's computers are rated as GHz - my laptop is supposedly 2.0 GHz - so what's the discrepancy here?

    Was the 1983 Compaq luggable with ungainly flexible disks really so powerful? Surely not.

    If a GFlop represents a Giga "floating-point arithmetic operation per second" then we have surely taken a backward step over 20+ years. Even allowing for a longer floating-point word.
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  2. #2
    Plutonium Lounger
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    Re: G-Flops (Historic)

    The photo is of a personal computer by NEC, not the 1.3 gigaflop supercomputer mentioned in the text. Present-day supercomputers can run at hundreds of teraflops, i.e. hundreds of thousands of gigaflops.

  3. #3
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    Re: G-Flops (Historic)

    Chris

    Are you trying to find a connection between GHz and Gflops? <img src=/S/confused.gif border=0 alt=confused width=15 height=20> These are different animals. <img src=/S/whisper.gif border=0 alt=whisper width=29 height=17>

    Do you remember the 80286 CPU and the 80287 Floating Point Unit (and the equivalent, older,8086/9087)? These were different physical chips...
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

    Ita, esto, quidcumque...

  4. #4
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    Re: G-Flops (Historic)

    >a personal computer by NEC, not the 1.3 gigaflop supercomputer
    Ah. Aother 20+ year puzzle walks out of my mind. Thanks.

  5. #5
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    Re: G-Flops (Historic)

    > These are different animals.
    Well, yes. I knew/figured GHz is the rate at which transistors switch, and GFlops is the rate of performing a floating-point operation (traditionally more burdensome that either fixed-point arithmetic or character arithmetic)

    >Do you remember the 80286 CPU and the 80287 Floating Point Unit
    Yes, I do, and the floating-point sim/emulation.
    I also remember floating-point software on a state-of-the-art CDC3300 a long time ago.

    As Hans has pointed out, I'm confusing the sizzle with the steak.

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