-------------- Original message ----------------------
From: Felix Miata 
> On 2008/01/15 14:20 (GMT) rallee2{at}comcast.net apparently typed:
> 
> > The percentage gain of 256M compared to 1000M is perhaps 25%
wheras the speed 
> gain is double.
> 
> Double what? The most I've observed is low single digit percentages.
> 
> Felix Miata  ***  http://mrmazda.no-ip.com/

Hello Felix
  Correct me if I'm wrong, but double the bus speed equals double the pipe
bandwidth.  Whether, or possibly whenever, one fully loads that pipe
depends on what one does with one's PC.  While I'm fully aware that
doubling say CPU speed doesn't double apparent computer speed, one good
reason this is so is due to the fact that quite often the CPU is wasting
cycles waiting around for ram and hard drive.  Having run perhaps 4 or 5
different PCs in a comparative way with DDR and DDR2 first in single rate
then in double rate, most benchmarks show a huge gain, most certainly not
low single digit percentage gains.  Of perhaps the most importance to the
user is apparent speed gain, and although highly dependant on CPU speed and
type as well as amount and timing of ram, the feel is greatly enhanced, not
some trivial speed gain.  Incidentally, since so much new content is
multimedia in nature (even tutorials for crying out loud) and since many
people, including me, even elect to connect their 
PCs in some manner to home entertainment systems these speed gains matter
as nobody wants stuttering audio or video.  Perhaps you don't use your
PC(s) in such a manner and thus don't tax the memory pipeline so much.  I
just remembered, IIRC, that you are a dyed in the wool Intel user and
therefore have not experienced the effect of on-die memory controller such
as exists in present AMD CPUs and, as an aside, will soon be adopted by
Intel.
Jimmy




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