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Old 04-10-2005, 03:15 PM   #1 (permalink)
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Default DDR and SD RAM

What is the difference between SD RAM and DDR Ram? I see in alot of computer ads, "512MB DDR SDRAM" Is it the same thing?

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Old 04-10-2005, 03:16 PM   #2 (permalink)
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Yes,DDR SDRAM is the same thing as DDR.SDRAM is the older version of ram and the newer version is DDR SDRAM.At witch DDR stands for Double Data Rate.

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Old 04-10-2005, 03:34 PM   #3 (permalink)
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DDR is just "Dual Data Rate SD Random Ascess Memory"

So its' SD RAM X 2
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Old 04-10-2005, 03:42 PM   #4 (permalink)
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DDR ram hits twice, at the top and bottom of each wave of voltage. Normal SD Ram hits only once, at the top of the voltage wave. DDR effectively doubles the speed of RAM.
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Old 04-10-2005, 09:06 PM   #5 (permalink)
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DDR stands for Double Data Rate and SDRAM stands for Synchronous Dynamic Random Access Memory, so when you see DDR SDRAM advertised it means: Double Data Rate Synchronous Dynamic Random Access Memory, (now you know why they shorten it)

there was SDRAM previously, which were rated in PC66, PC100, PC133, and PC150, its 168-in RAM as DDR is 184-pin
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