Will DDR3 Overshadow DDR2 In The Coming Years ? With the arrival of DDR3 in the market, things have come down for DDR2. Everything is fine with DDR3 except the fact that it is very expensive and not many people wants to buy it paying higher price. This is still making DDR2 popular and favorite amongst the user. It is believed that DDR3 has a very little advantage over DDR2.

Moreover, branded names like Kingston, Hynix, Aum, Crucial are coming up with new and powerful DDR2 kit which can overshadow DDR3. The price of these newly launched DDR2 kit will be comparatively lower than DDR3, this would definitely attract a huge number of user to use the product.

Following is the Features of both DDR2 & DDR3, read it and give reviews which one is better. It is ultimately the user who would decide which one is better in terms of everything ( performance and price).

Features of DDR2

1. DDR2 SDRAM - High-density memory that achieves high-speed operation and low power consumption at the same time2. DDR2 SDRAM - High-density memory that achieves high-speed operation and low power consumption at the same time3. DDR2 SDRAM achieves a data transfer rate of up to 667Mbps, double the data transfer rate of DDR333, and its 1.8V operation provides lower power consumption than DDR SDRAM. Additionally, DDR2 SDRAM is available in an FBGA (Fine-pitch Ball Grid Array) package that saves space in the system and enables fine signal integrity.4. DDR2 SDRAM realizes high speed and high density for a high-performance system.DDR2 is a type of an SDRAM, this computer memory stores its memory in memory cells. These cells are then activated at according times to correctly operate with an external data bus. Although the DDR2 shares many similarities with the original DDR, as in the case with data transfer happening with the rise and fall at the edge of the clock, it is different in that the DDR2's bus is clocked at twice the speed. This basically allows the DDR2 to be twice as more efficient than the original DDR.

The key behind the high bus frequency with DDR2s is the coalition of electrical interface improvements, prefetch buffers, and various off-chip drivers. This is because DDR's prefetch buffer is twice of the DDR, which is 2bits deep. Also, its read latencies are between four and six cycles; again this is twice that of the DDR. Thus, twice as much bus speed is necessary to achieve an equal latency.

Also, the DDR2 RAM Memory is packaged relatively more expensively and more complicatedly than the DDR SDRAM or the SDR SDRAM, in exchange for a more blazing speed.

Backward compatibility with DDR2 DIMMs are quite limited. In fact, they are not designed to be compatible with DDRM DIMMs at all. This is because firstly, the notch positions in the

DDR2 and the DDR are different along with the pin density slightly higher on the DDR DIMMs. Although not much of a "backward compatibility," but faster DDR2 DIMMs can be used with slower DDR2 DIMMs. However, in such a situation, the faster one would run at the speed of the slower DDR2.

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