PCxxxx rating ....

OK followin .... last a friend and I wondered how the PCxxxx rating is calculated ....

clock 200 = DDR400 * 8 = PC3200 clear
but we wondered ... why *8 and why is the old PC100 SDRAM Pc100
from the XDR arcticle I got that the *8 are 8 bytes transfered at ones ...
so XDR is 3,2GHz = XDR3200 * 2 = PC6400 right ???

so does this mean old SDRAM can only transfer 1 byte ?
so SD = 133 = SD133 *1 = PC133 ?

*scratches head* Who cares as long as it's fast and it works! lol

When DDR was introduced they changed from the SDRAM PC100, PC133, etc... naming scheme which represented the bus speed the module could operate at to the PC1600, PC2100, etc.. naming scheme which represents the theoretical bandwith of the module because they wanted to sound faster than RDRAM modules which were being named PC600, PC700, PC800, etc...at the time. It's all just a marketing ploy.

If they were to rename SDRAM modules to the DDR scheme then...
PC66 = PC533
PC100 = PC800
PC133 =PC1066

thx thats what I wanted to know ...