DDR 3 RAM Components, Modules and Advantages compared to DDR2

on 22 November 2010

DDR3 SDRAM is a modern kind of dynamic random access memory (DRAM) with a high bandwidth interface. It stands for double data rate type three synchronous dynamic random access memory. Let us check out it components, modules and advantages compared to DDR Ram.

I wont explain this in details because writing about hardware is always a boring task for me.

DDR3 SDRAM Components:

  • First Introduction of asynchronous RESET pin.
  • Support of system level flight time compensation.
  • On-DIMM mirror friendly DRAM pin out.
  • Introduction of CWL (CAS Write Latency) per clock bin.
  • On-die I/O calibration engine.
  • READ and WRITE calibration.

DDR3 Modules

  • Fly-by command/address/control bus with on-DIMM termination.
  • High precision calibration resistors.
  • Are not backwards compatible-wrongly inserting a DDR3 module into a DDR2 socket can damage the DIMM and/or the motherboard.

Advantages of DDR3 RAM compared to DDR2 RAM

  • Higher bandwidth performance, effectively up to 1600 MHz
  • Improved latencies as measured in nanoseconds.
  • Higher performance at low power (longer battery life in laptops).
  • Enhanced low power features.


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