Double Data Rate. It means that information is transferred both on the up tick and down tick of a clock, if you really want the long explanation
DDR-SDRAM
SDRAM.
DDR or SDRAM
The fastest technology in actual is laan, laan is the longest and most profound memory ever.
The PNY PC-3200 1 GB DDR SDRAM is considerably fast memory-wise.
The term DDR SDRAM refers to the phrase "double data rate synchronous dynamic random access memory". DDR SDRAM is simply a faster version of SDRAM in which data travels at a double rate. If your computer specs say that it uses DDR SDRAM it can take DDR SDRAM, but not SDRAM. DDR is 184 pins and has a notch in the bottom near the center and you will be unable to put DDR in an SDRAM mother board and also unable to put SDRAM in a DDR motherboard. Recently a new type of RAM has been introduced to market called DDR2. DDR2 is its own type and will not fit into a DDR motherboard. Hope this helps. Peace.
184-pin DIMM
No. SDRAM and DDR SDRAM are not compatible with each other.
Stands for "Double Data Rate." It is an advanced version of SDRAM, a type of computer memory. DDR-SDRAM, sometimes called "SDRAM II," can transfer data twice as fast as regular SDRAM chips. This is because DDR memory can send and receive signals twice per clock cycle. The efficient operation of DDR-SDRAM makes the memory great for notebook computers since it uses up less power.
depending on the laptop, it could be DDR, DDR2 or DDR3. But the form factor is all the same. Its all SO-DIMM memory
SGRAM
DDR sdram deals with memory and with that being said here is a great link that will tell you everything and more on the subject. http://en.wikipedia.org/wiki/DDR_SDRAM