and i'll throw more petrol on the fire:  it's more likely that a lot of what's going on with display is directly attached to the amount of video memory you have, how fast the card can display, and the quality of its dos drivers...

i think, lee, a better comparison would be done amongst machines with absolutely identical hardware, then changing out video and cpu as you can...  i would not be surprised to see vast differences in speed for same CPU when video cards are different...

  Pedro Lopes <paol1976@yahoo.com> wrote:

Lee Skinner wrote:
> A few weeks ago, I was mentioning that I was considering a CPU upgrade. I
> have now done that, and I wanted to mention the following single benchmark
> that I made. I went from a 233Mh Pentium 1 to a 2Gh Pentium 4. I used DOS
> 4DOS under DOS 6.22 on both machines. (Sorry, Rich!) I was told that the P4
> emulates 16-bit applications slower than the original Pentium does, so I
> didn't know what increase in speed I'd get. There was an 858% increase in
> CPU processor speed for the two machines, but what would be the increase in
> Fractint calculation speed? I ran an arbitrary precision mandelbrot on both:
>
> Pentium 233Mh: 0:37:44.42 (2264.42 sec)
> Pentium 4 2Gh: 0:06:04.33 ( 364.33 sec)
>
> or a 621.53% increase speed for the Fractint CPU time.
>
> The ratio of the Fractint speed increase to the CPU speed increase is
> .7244, the penalty for running a 16-bit application on the P4. This ratio is

Er, it's a lot more complicated than that. You can't really compare
clock speeds between different processor models. The only meaningful
comparison is just running a benchmark and comparing times (which is
what you did, of course :)

> higher than I expected, and I do get more than a 6-fold increase in
> Fractint calculation speed. But what if I had upgraded to an AMD Athlon? I
> would like to know what this ratio would have been for that!

I have a 1.4GHz Athlon. Please post the PAR you used for your benchmark
(and the video mode) and I'll be glad to give it a run and post the times.
I'm curious about the result myself.

Pedro


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