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Most desktops and notebooks use one of the three most popular types of synchronous dynamic random access memory (SDRAM) for the main system memory. Single data rate (SDR) SDRAM is the older type of memory, commonly used in computers prior to 2002. Double data rate (DDR) SDRAM hit the mainstream computer market around 2002, and DDR2-based systems hit the market in mid-2004.
DDR SDRAM is a straightforward evolution from SDR SDRAM. The big difference between DDR SDRAM and SDR SDRAM is that DDR reads data on both the rising and falling edges of the clock signal, so the DDR module can transfer data twice as fast as SDR SDRAM.
While DDR has a limited clock rate, the evolutionary changes to DDR architecture enable DDR2 to achieve speeds beyond of DDR, delivering bandwidth of 5.3 GB per second and beyond! Because DDR2 is able to operate with faster bus speeds, your memory doesn't hold back the performance of your processor.
Generally speaking, motherboards are built to support only one type of memory. You cannot mix and match SDRAM, DDR, or DDR2 memory on the same motherboard in any system. They will not function and will not even fit in the same.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThe key difference between DDR and DDR2 is that in DDR2 the bus is clocked at twice the speed of the memory cells, so four words of data can be transferred per memory cell cycle. Thus, without speeding up the memory cells themselves, DDR2 can effectively operate at twice the bus speed of DDR.
DDR2 is a 240-pin module, DDR is a 184-pin module.
DDR2 gets double speed that DDR.
Standard name Memory clock Cycle time I/O Bus clock Data transfers per second Module name Peak transfer rate DDR2-400 100 MHz 10 ns 200 MHz 400 Million PC2-3200 3.200 GB/s DDR2-533 133 MHz 7.5 ns 266 MHz 533 Million PC2-4200 4.264 GB/s DDR2-667 166 MHz 6 ns 333 MHz 667 Million PC2-53001 5.336 GB/s DDR2-800 200 MHz 5 ns 400 MHz 800 Million PC2-6400 6.400 GB/s DDR2-1066 (planned) 266 MHz 3.75 ns 533 MHz 1066 Million PC2-8500 (planned) 8.500 GB/s
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What's the difference between DDR & DDR2 RAM for my iMac?
DDR is not as fast ad the DDR2 ans that is the main difference.
Ddr sdram can replace by ddr2?
No, the slots for DDR2 RAM is different from the DDR RAM. You cannot use DDR RAM with DDR2 slot.
What is the physical difference between ddr1 and ddr2 ram?
DDR has a 184-pin DIMM interface and DDR2 has 240. DDR2 runs cooler and has generally slower timings but is a lot faster than DDR in the end. DDR2 is capable of holding more ram on one DIMM.
Can you use ddr2 ram with ddr ram?
no...you can't
What is the difference between memory for DDR2 RAM and DDR3 RAM?
The difference between the memory of the DDR2 RAM and the DDR3 RAM are the capacity that they can hold the DDR3 RAM is more powerful than the DDR2 RAM.
Which ram that is not used frequently today?
ddr, or ddr2
What is the difference ddr1 ddr2 ram?
The difference between DDR1 ram and DDR2 ram, is the advancement in technology. When you upgrade to DDR2, you are doubling the amount of flow information that can take place.
Can you use a DDR2 RAM module in a DDR memory slot?
No DDR2 and DDR are not compatible and so you can not add DDR2 RAM module in a DDR Slot. Electrical specifications like voltage, signal pinout and even mechanical size and shape of modules are different.
Can mother board use both ddr ddr2 ram?
No DDR and DDR2 Slots are differant on Motherboard so cant replace each another
Which one is more expensive ddr1 ram or ddr2 ram?
DDR by a long shot
What is the difference between ram and ddr2 ram?
There are both the same thing, ddr2 ram, is faster that ddr1 ram but ddr3 ram is more modern and faster
Can a ddr2 ram replace a ddr ram?
No! They will not even fit into the socket unless its the correct one.
