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    Features of DDR3 Memory RAM

    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 compared to DDR2
    • 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
    Disadvantages compared to DDR2
    • Incompatible with DDR2 motherboards
    • As of January 2009, costs somewhat more than equivalent DDR2 memory

Not sure which DDR memory your system takes? Here are some tools to help you find compatible DDR Memory.

DDR Memory Selector

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DDR3 standard modules

Standard name Memory clock Cycle time I/O Bus clock Data transfers per second Module name Peak transfer rate
DDR3-800 100 MHz 10 ns 400 MHz 800 Million PC3-6400 6400 MB/s
DDR3-1066 133 MHz 7.5 ns 533 MHz 1066 Million PC3-8500 8533 MB/s
DDR3-1333 166 MHz 6 ns 667 MHz 1333 Million PC3-10600 10667 MB/s[1]
DDR3-1600 200 MHz 5 ns 800 MHz 1600 Million PC3-12800 12800 MB/s


DDR3 Memory RAM Upgrades


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DDR Memory RAM