🚀 go-pugleaf

On Fri, 21 May 2004 02:01:03 -0700, "Rick" <me@privacy.net> wrote:

>"Xalinai" <xalinai_Two@xalinai.de> wrote in message news:40adbaee.669052187@news.t-online.de...
>> 2) Most current processors are able to process more data than their
>> memory interface can provide. FSB 800 is promising but still: getting
>> the hardware that gives you the last five percent of performance will
>> never pay.
>
>Promising?  Five percent?  Where have you been the last year?
>
>FSB 800MHz pumps twice as much data to a cpu (or cpus) as
>400MHz, and 50% more than 533MHz.

Sure. 

But it does so for how much of the total code processed? And it does
so in what address mode?

How does a graphics application work? Adressing pixels, 3 bytes per
pixel. PS is processing data bytewise or double-byte-wise (in 16 bit
mode) adressing multiple pixels in a grid that makes memory locations
of pixels in adjacent rows three times the image width apart (Filters,
sharpen, blur). This isn't very much the thing that high speed burst
mode was designed for.

You won't get much more than five to ten percent on application level
from the faster memory bus on the average system. There will be more
if memory access is the major bottleneck in two (otherwise similar)
competing systems for specific applications (like Video streams).

Michael