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SD Ram is actually SDR SDRAM, and DD Ram is actually DDR SDRAM, though the former does not usually have the SDR in front of it. The letters SDR and DDR stand for Single Data Rate and Double Data Rate, and the letters SDRAM stand for Synchronous Dynamic Random Access Memory. The main difference between SDR and DDR memory is speed. There are a lot of little differences, but the main one (IMHO) that affects the user is speed: DDR can transfer data at roughly twice the speed of SDR. More speedy data rates = better performance. Just remember, the motherboard you are using must include the appropriate chipset to support the different RAM types. They are not interchangeable. SDR SDRAM comes in three main flavors: PC66, PC100 and PC133. Each successive number refers to the bus speed of the RAM in MHz, thus PC66 runs at 66 MHz, PC100 runs at 100 MHz, etc. SDR SDRAM has 168 pins at the connector.

DDR SDRAM has 184 pins at the connector, which is one reason you can't just use DDR instead of SDR, and comes in many different flavors; PC2100 which runs at 266 MHz, PC2700 which runs at 333 MHz, PC3200 which runs at 400 MHz, etc. While the numbers on SDR SDRAM referred to clock speeds, the DDR SDRAM numbers come from the theoretical maximum bandwidth in Megabytes per second (MB/s). Thus, PC2100 has a theoretical maximum bandwidth of 2100 MB/s, but runs at 133 MHz. DDR SDRAM modules are now available from PC1600 all the way up to PC4400, which has a bandwidth of 4400 MB/s and runs at 550 MHz. In order to know which type of RAM you need, you must know what your motherboard supports. I recommend searching the motherboard manufacturer's website for this info, or review sites like tomshardware.com or sharkyextreme.com. Good luck!

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8y ago
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15y ago

In electronic engineering, DDR2 SDRAM or double-data-rate two synchronous dynamic random access memory is a random access memory technology used for high speed storage of the working data of a computer or other digital electronic device.It is a part of the SDRAM (synchronous dynamic random access memory) family of technologies, which is one of many DRAM (dynamic random access memory) implementations, and is an evolutionary improvement over its predecessor, DDR SDRAM.Its primary benefit is the ability to operate the external data bus twice as fast as DDR SDRAM. This is achieved by improved bus signaling, and by operating the memory cells at half the clock rate (one quarter of the data transfer rate), rather than at the clock rate as in the original DDR. DDR2 memory at the same clock speed as DDR will provide the same bandwidth but markedly higher latency, providing worse performance.DDR is for computer with Pentium 4 processor

DDR2 is for computer with dual core or core2 duo processor

SDRAM is for Pentium 3

it means that computer with dual core cannot use DDR or SDRAM

it's not convert... yavila vmarshburn

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13y ago

Ram bus DR and DDR, Ram bus DR is alot faster than DDR but 2x as expensive.

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15y ago

whay is sdddr ram

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Q: Difference between sdram and ddrram
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What is the difference between a sdram and a mobile sdram?

Physical size of the memory card. Mobile sdram is smaller than sdram for desktops.


What is the difference between shared dual channel ddr2 SDRAM at 533mhz or ddr2 SDRAM at 667mhz?

Obviously the difference is speed.


Can you explain the difference between Dram and SDram?

Dram and Sdram are two different types of memory.


The main difference between sdram and dram is that dram is?

The main difference between Synchronous random access memory, SDRAM and Dynamic Random Access Memory, DRAM is that SDRAM is synchronous while DRAM is asynchronous. As such, SDRAM is efficient in retrieving and storing data than DRAM.


What is the difference between SDRAM and DDRAM?

http://en.wikipedia.org/wiki/DDRAM http://en.wikipedia.org/wiki/SDRAM It explains everything.


Is there a functional difference between DRAM and SDRAM memory, and if so, which is best for the price?

It's the same thing, Synchronous Dynamic RAM (SDRAM) is typically just a different name for DRAM.


What is the difference between DDR2 SDRAM PC2 133 168pin and DDR2 memory?

speed?maybe.but more likely the spelling.."DDR2" has no"SDRAM PC2 133 168pin" unlike the"DDR2 SDRAM PC2 133 168pin"It's really hard to see it at a first glance..


What is the difference between 2gb sdram and 3gb sdram from a user standpoint?

The 3GB ram has one more GB than the 2GB RAM. From a user's point of view, that's 33.33 per cent more.


Whats the difference between SDRAM and normal ram?

sd ram is synchronous dynamic random access memory, ram is just random access memory


What is the difference between SDRAM PC133 and PC133 SDRAM module and what sort of RAM suitable for Gateway computer?

If the label on one RAM chip says "PC133 SDRAM" and the label on another chip says "SDRAM PC133", they are the same thing. There is no different between them. If you want to put more RAM in your computer you first want to check and make sure you have the extra slots necessary. You usually want to get the same kind of RAM that is already in there. So if the existing RAM is PC133, you want to get more PC133 RAM.


Can you put sdram in a ddr sdram system?

No. SDRAM and DDR SDRAM are not compatible with each other.


What is the function of sdram?

function of sdram