On 2008/01/16 14:03 (GMT) rallee2{at}comcast.net apparently typed:

>   Correct me if I'm wrong, but double the bus speed equals double the
pipe bandwidth.

True - when the doubling is truly doubling. Ever since DDR, RAM speed has
been marketed differently than it had been in the past. In the past, the
advertised speed was the RAM bus MHz. Since DDR, the marketed DDR number is
at least double the MHz of the RAM bus. IOW, the bus of DDR400 operates at
200 MHz. The other doubling to get to 400 happens by the doubling of the
amount of data transfered per clock cycle. I've not yet investigated to see
what DDR2 or DDR3 actually amount to, so don't know if a tripling or
quadrupling of the data transferred per cycle is involved.

> 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

Mozilla gobbles plenty RAM, but other than that, I don't really tax a system
except when compiling a kernel or a mozilla product. I watch movies on a much
much bigger TV screen than my PC screens.

> 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

http://mrmazda.no-ip.com/files/memtest.wks which you can download and open in
1-2-3 or anything that knows how to open an old 1-2-3 file, has my data
collected from running memtest86* on various systems. Both AMD & Intel are
represented, but the fastest in there is already pretty old technology.
-- 
"In the beginning was the Word, and the Word was
with God, and the Word was God." John 1:1 NIV

 Team OS/2 ** Reg. Linux User #211409

Felix Miata  ***  http://mrmazda.no-ip.com/


 
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