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To: Bilow who wrote (41052)4/27/2000 2:24:00 PM
From: Bilow  Respond to of 93625
 
In answer to a PM: Sure the pixel size changes with time, but the beauty of that ratio is that the ratio takes the change in pixel size into account.

You have not read my posts carefully enough. The ratio holds regardless of how the memory is used to describe the image.

If the image is a simple 80x24 text image, and it is described by a buffer that contains the ascii text only, then it is the case that the amount of memory required is very small, and so is the bandwidth. But the ratio is still around 1/120.

If the image is a 4000x3000 screen described by exceedingly complex triangles, with 3-dimensional shading and nuances of depth, etc., etc., then the amount of memory required is large, and so is the bandwidth. Both numbers are many orders of magnitude larger, but the ratio is still around 1/120.

Why am I having trouble explaining this simple fact to so many intelligent people? Is my writing so dense, or is the concept that complicated? You have a big memory, you are going to need a big bandwidth. You have a small memory, you are going to need a small bandwidth. Doesn't this make sense?

This is such a simple and obvious thing.

-- Carl



To: Bilow who wrote (41052)4/27/2000 3:09:00 PM
From: Plaz  Respond to of 93625
 
I never ever said that memory bandwidth wasn't a problem for graphics. Never, ever, ever, did I say such a thing. You keep putting these words in my mouth, but I never ever, ever said such a thing.

And I never said that you said that. You said that, going forward, your 120Hz/bit rule would hold true for display memories.

I disagreed. And I posted my reasons why, which I believe I have shown to be valid reasons.

Plaz