RAM: DDR vs DDR2 - What is the difference

In this practical tip, we explain the difference between the memory types DDR and DDR2. It may be worth buying a new motherboard or a new PC system that processes the faster type of memory.

What is GDR?

In the meantime, motherboards are no longer built for this type of memory. However, there are still a lot of PC systems in which DDR memory is installed. So it's worth comparing with DDR2.

• Effective memory clock: clock frequencies of 200 to 400 MHz are common.
• Voltage: DDR memories have a supply voltage of 2.5 volts.
• Memory module size: The modules are usually 256 to 1024 megabytes in size.

DDR2 compared to DDR

DDR2 is a further development of the DDR memory type. With DDR2, higher clock speeds can be achieved and electricity can be saved.

• Effective memory clock: In principle, DDR2 offers a higher memory clock than DDR. However, memory settings sometimes have to be made in order to achieve higher clock rates. Many manufacturers now offer memories that allow higher frequencies (up to 1066 MHz).
• Voltage: DDR2 memories have a supply voltage of 1.8 volts. This type of memory can therefore save electricity compared to DDR memory.
• Memory module size: A DDR48 memory module size of 2048 megabytes is possible. Memory-intensive operating systems use this size and work much faster.