DDR2 Vs DDR3 | Difference | Comparison

What's the difference between DDR2 and DDR3 memory? What distinguishes them? Can DDR3 memory use in a DDR2 socket? Get all of the answers right here. Let's look at the difference between DDR3 and DDR2 memory and how to tell them apart.

What is DDR2?

DDR2 is an abbreviation for double data rate version 2. It is the second generation of DDR memory. This RAM variant was designed to achieve a high data throughput when transferring blocks. It is the successor to DDR in terms of block transfer throughput. It is DDR's successor, with the main difference being an increase in the operational frequency of the RAM chip and the prefetch buffer, as well as an increase in the amount of both parameters. In the DDR2 RAM chip, the prefetch buffer is a 4-bit memory catch.

What is DDR3?

DDR3 stands for double data rate 3. DDR3 is a synchronous random access memory. In DDR3, self-refresh and auto-refresh are used to refresh its contents. DDR3 consumes less power since it uses self-refresh, which ranges from 800 to 2133 MHz.

DDR2 Vs DDR3 | Difference between DDR2 and DDR3 

  • DDR2 stands for double data rate version 2. DDR3 stands for double data rate version 3.
  • DDR2 is cheaper than DDR3. DDR3 is costlier.
  • DDR2 provides 4 knowledge transfers per cycle. DDR3 provides 8 knowledge transfers per cycle.
  • Performance wise DDR2 is superior to DDR2. While DDR3 is average in terms of performance.
  • The DDR2 supply voltage required 1.8 volts.  Whereas DDR3 supply voltage required 1.5 volts.
  • No memory reset in DDR2.  A memory reset option is available in DDR3.
  • Clock speed range between 400 Mhz to 800 Mhz in DDR2 ram, On the other hand, the clock speed of DDR3 ram is between 800 MHz to 1600 MHz.
  • DDR2 consumes more power. But DDR3 consumes less power.
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