Ddr Question

Now it is time for the stupid question of the day - I know DDR stands for dbl rtate transfr - the question is since it is double the rate if you have 256 DDR is equivalent to 512 SDram? Or does it just process the 256 twice as fast? Ok now you can throw the rocks/bottles and cans

Thanks

DDR = Double Data Rate

No it is not twice as fast as SDRAM and it is not equall to twice the amount of SDRAM. And there are no stupid questions, We all have to learn somehow.

it is mean Double Data Rate.

however, that "Data Rate" doesn't mean anything to the phyical amount of the memory tho. so, a 256MB IS a 256MB. no more, no less.

what exactly "Double Data Rate" means is it double the data transfer rate. a PC100 actually operate at 100MHz. PC133 runs at 133MHz.

a DDR2100, actually SHOULD be named DDR266, b/c it double the operation speed running at 266MHz!

i know it's very confusing 'bout the name scheme of DDR since they are not named after there "operation speed" (DDR 266) like PC66/100/133 but there total bandwidth (total of 2.1G/1.6G bandwidth) as DDR2100/DDR1600.

so, it actually should be PC100, PC133, DDR200 (double the rate of PC100), DDR266 (double of PC133), etc.

Thanks for clarifying the issue it was a little confusing and general research di not provide the answers, Thanks again

GW