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Image for 2GB DDR2 PC2-6400 Unbuffered NON-ECC 1.8V 256Meg x 64 from Crucial USA

2GB DDR2 PC2-6400 Unbuffered NON-ECC 1.8V 256Meg x 64


  • Brand: Crucial
  • Form Factor: UDIMM
  • Capacity: 2GB
  • Warranty: Limited Lifetime
  • Specs: DDR2 PC2-6400 • CL=6 • Unbuffered • NON-ECC • DDR2-800 • 1.8V • 256Meg x 64 •
  • Series: Crucial
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    5 stars 406 reviews
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    • $26.99
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    2GB DDR2 PC2-6400 Unbuffered NON-ECC 1.8V 256Meg x 64

    product information

    Form Factor
    Kit Qty
    DIMM Type
    Bullet Features
    Product Specifications
    Brand Crucial
    Form Factor UDIMM
    Capacity 2GB
    Warranty Limited Lifetime
    Specs DDR2 PC2-6400 • CL=6 • Unbuffered • NON-ECC • DDR2-800 • 1.8V • 256Meg x 64 •
    Series Crucial
    Kit Qty 1
    Speed 800MHZ
    Tracer False
    Voltage 1.8V
    DIMM Type Unbuffered
    Bullet Features Increases system performance
    More information

    240-pin DIMM

    A dual inline memory module (DIMM) consists of a number of memory components (usually black) that are attached to a printed circuit board (usually green). The gold pins on the bottom of the DIMM provide a connection between the module and a socket on a larger printed circuit board. The pins on the front and back of a DIMM are not connected to each other.

    240-pin DIMMs are used to provide DDR2 SDRAM memory for desktop computers. DDR2 is a leading-edge generation of memory with an improved architecture that allows it to transmit data very fast.

    Each 240-pin DIMM provides a 64-bit data path (72-bit for ECC or registered or Fully Buffered modules). (The Ballistix™ and Ballistix Tracer™ high-performance memory do not come in 72-bit or registered modules.)

    To use DDR2 memory, your system motherboard must have 240-pin DIMM slots and a DDR2-enabled chipset. A DDR2 SDRAM DIMM will not fit into a standard SDRAM DIMM socket or a DDR DIMM socket.

    The number of black components on a 240-pin DIMM can vary, but it always has 120 pins on the front and 120 pins on the back, for a total of 240. 240-pin DIMMs are approximately 5.25 inches long and 1.18 inches high, though the heights can vary. While 240-pin DDR2 DIMMs, 184-pin DDR DIMMs, and 168-pin DIMMs are approximately the same size, 240-pin DIMMs and 184-pin DIMMs have only one notch within the row of pins. The notch in a 240-pin DDR2 DIMM is closer toward the center of the module.

    product reviews

    OID: 7851FD5EA5CA7304
    PR file path: /pwr/96v439cu/inline/09/77/7851FD5EA5CA7304-en_US-1-questions.html

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    Get answers from real customers and in-house experts with AnswerBox.

    1 Question | 1 Answer
    Displaying question 1
    • Q:

      Why is this memory not compatible with Dell Dimension E510? What is the difference between this memory (CT25664AA800) and CT1278833? Thanks!
      Asked on 8/9/2011 by Anonymous

      1 answer

      • Staff Reviewer


        That particular memory module is guaranteed to be compatible with the E510; the part number for it is CT1278832.

        CT1278833 refers to a 4Gb kit (2x CT1278832).

        Answered on 8/10/2011 by Crucial Support from Meridian, Idaho
    Displaying question 1

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