Crucial Community Forum

The fastest way to get answers to your technical support or customer service questions. Register now to be part of the Crucial online community, so you can search for the information you need.

Live Chat


Hours (MST):
Monday - Friday: 7am - 6pm
Saturday: 8am - 2 pm

Send us an e-mail

For the most immediate feedback, use our Live Chat. Chat hours are 7 a.m. to 6 p.m. (MST) Monday-Friday and 8 a.m. to 2 p.m. Saturday.

Toll-free for US and Canada
800-336-8915

Phone
1-208-363-5790

Toll-free for Australia and New Zealand
1-800-142982

Hours (MST):
Monday - Friday: 7am - 6pm
Saturday: 8am - 2 pm (chat only)

Share or ask for feedback from your Facebook friends.


  Get a friend's opinion.


Need to know if this part is compatible?

Crucial Memory Advisor™ tool

The Crucial Memory Advisor™ tool is a quick, 3-step process to find guaranteed-compatible memory for computers and motherboards.

Step 1 —

Step 2 —

Step 3 —

RAM Memory Configurator

4GB kit (2GBx2), 240-pin DIMM, DDR2 PC2-6400 memory module

4GB kit (2GBx2), 240-pin DIMM, DDR2 PC2-6400 memory module
Part Number: CT2KIT25664AA800
  • Module Size: 4GB kit (2GBx2)
  • Package: 240-pin DIMM
  • Feature: DDR2 PC2-6400
  • Specs: DDR2 PC2-6400 • CL=6 • Unbuffered • NON-ECC • DDR2-800 • 1.8V • 256Meg x 64 •
    What does this mean?
 $71.99
Qty:

REVIEW SNAPSHOT®

by PowerReviews
Crucial4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400
 
4.7

(based on 14 reviews)

Ratings Distribution

  • 5 Stars

     

    (11)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Reliable (10)
  • Easy to install (9)
  • Increases speed (9)
  • Fast (4)

Cons

    Best Uses

    • Multiple desktop applications (10)
    • Increased performance (9)
    • Multimedia (6)
      • Reviewer Profile:
      • Power user (10), Casual user (4)
      • Primary use:
      • Personal (14)

    Most Liked Positive Review

     

    Overall Satisfied

    I bought the kits to build two new systems (one for me, one for my wife). Performance on one kit has been fantastic. The other kit had one bad stick, waiting for ...Read complete review

    I bought the kits to build two new systems (one for me, one for my wife). Performance on one kit has been fantastic. The other kit had one bad stick, waiting for RMA to process, but I would definitely purchase this kit again.

    VS

    Most Liked Negative Review

     

    ram is good [...]

    [...]

    [...]

    Reviewed by 14 customers

    Sort by

    Displaying reviews 1-10

    Back to top

    Previous | Next »

     
    5.0

    perfectttt....i love itt

    By Jason the runner

    from new york city

    About Me Casual User

    Pros

    • Fast
    • Increases Speed
    • Large Capacity
    • Reliable Performance

    Cons

    • Difficult To Install
    • No Increase In Speed
    • No Instructions Included
    • Unreliable Performance

    Best Uses

    • Gaming
    • Increased Performance
    • Multimedia
    • Multiple desktop applications

    Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

    perfect it will not do you wrong

    • Primary use:
    • Personal
     
    4.0

    Easy to install no guess work

    By Billy

    from Westfield, MA

    About Me Casual User

    Verified Reviewer

    Pros

    • Increases Speed

    Cons

      Best Uses

        Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

        This is a nice product, easy to install and no guess work picking it out. It increased speed but not as much as I thought it would. It seems as my computer may have other issues with too many programs and processes running at the same time.

        • Primary use:
        • Personal
         
        5.0

        Problem Solved!

        By Rut

        from Prattville, AL

        About Me Casual User

        Verified Reviewer

        Pros

        • Easy To Install
        • Increases Speed

        Cons

        • No Instructions Included

        Best Uses

        • Increased Performance
        • Multiple desktop applications

        Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

        My computer was so slow pulling up web pages and anything that dealt with MS Office. I only had 1 gig of memory on my computer. I was very close to getting a new pc. I did some research and thought I'd take a chance on some more ram. Upgraded from 1 gig to 4 gigs and man what a difference it made!!! I should be able to hold on to my XP computer at least another couple of years or until Microsoft quits supporting it. If your computer is slow and you've tried everything like I have, try getting more RAM. It's a cheap upgrade, simple to install and REALLY HELPS!! I am well satisfied for [$]..

        • Primary use:
        • Personal
         
        5.0

        This is the best choice for this upgrade

        By MK the one friends call on for help!

        from Vacaville CA

        About Me Power user

        Verified Reviewer

        Pros

        • Increases Speed
        • Installs easily
        • Reliable Performance

        Cons

          Best Uses

          • Increased Efficiency
          • Increased Performance

          Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

          This upgrade in the best way to maximize the performance and speed of the emachine EL1333G-03W.

          • Primary use:
          • Personal

          (1 of 1 customers found this review helpful)

           
          5.0

          Excellent Memory... Solved my PC Problem

          By 68BlueCam

          from Ashland, MS

          About Me Power user

          Verified Reviewer

          Pros

          • Increases Speed

          Cons

            Best Uses

            • Increased Performance

            Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

            Solved my PC problem immediately as this was a matched set of 2-units unbuffered. NewEgg had sent me some GSkill Memory 2-times and it was bad both times. I've always had good luck with Crucial and have learned my lesson when it comes to memory for PC's.

            • Primary use:
            • Personal

            (2 of 2 customers found this review helpful)

             
            5.0

            Can I do it again? :D

            By Stoutn

            from Illinois

            About Me Power user

            Verified Reviewer

            Pros

            • Easy To Install
            • Fast Delivery
            • Increases Speed
            • Reliable Performance

            Cons

              Best Uses

              • Increased Performance
              • Multimedia
              • Multiple desktop applications

              Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

              My order was in my hands in roughly two days. Super easy to install, and perfect match for my computer. I will never shop anyone but Crucial.com for my memory upgrades again.

              • Primary use:
              • Personal
               
              5.0

              Truly Plug & Play in my HP a6838f

              By HP a6838f Upgrade

              from Hudson, Ohio

              About Me Casual User

              Verified Reviewer

              Pros

              • Easy To Install
              • Fast
              • Reliable Performance

              Cons

              • None

              Best Uses

              • Increased Performance
              • Multimedia
              • Multiple desktop applications

              Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

              In July of this year I purchased a new HP a6838f with the intent of upgrading to the specs that I wanted at a total cost that was $150 less than ordering a Desktop Computer "off the shelf" with the specs that I wanted. The two upgrades that I made were an upgraded DVI capable graphics card and an additional 4 MB of RAM for a total of 8 MB. The upgrade in both cases was quick, painless, and truly plug & play.

              • Primary use:
              • Personal
               
              5.0

              Works Fine

              By Sam

              from Hugo, OK

              About Me Power user

              Pros

              • Easy To Install
              • Increases Speed
              • Reliable Performance

              Cons

                Best Uses

                • Increased Performance
                • Multimedia
                • Multiple desktop applications

                Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

                Works great. Does what it is supposed to do.

                • Primary use:
                • Personal

                (0 of 4 customers found this review helpful)

                 
                3.0

                ram is good [...]

                By patsspot1974

                from florida

                About Me Power user

                Verified Reviewer

                Pros

                • Easy To Install
                • Increases Speed
                • Reliable Performance

                Cons

                  Best Uses

                  • Increased Performance
                  • Multimedia
                  • Multiple desktop applications

                  Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

                  [...]

                  • Primary use:
                  • Personal

                  (1 of 1 customers found this review helpful)

                   
                  5.0

                  great seller,excellente product.

                  By torombolo13

                  from DAVIS,ILLINOIS

                  About Me Power user

                  Verified Reviewer

                  Pros

                  • Easy To Install
                  • Increases Speed
                  • Reliable Performance

                  Cons

                  • Nothing

                  Best Uses

                  • Multiple desktop applications

                  Comments about Crucial 4GB kit (2GBx2) 240-pin DIMM DDR2 PC2-6400:

                  personal use,good product easy to install,[...]excellent communication.

                  • Primary use:
                  • Personal

                  Displaying reviews 1-10

                  Back to top

                  Previous | Next »

                  Why doesn't Windows recognize all of my memory?
                  What is my computer model?
                  What’s eating your memory? It could be your browser.
                  1.35v - 1.5v Dual-Voltage DDR3 memory
                  How do I know what kind of memory to purchase?
                   
                  Memory compatibility help.
                  UDIMM with Thermal sensor
                  BSOD with MSI Platinum P35 and 8GB of RAM
                  x3755 Memory Modules
                  Memory Result Interpretation please
                   

                  240-pin DIMM

                  240-pin DIMM for DDR2 memory
                  Approximately 5.25 in. by 1.18 in. (133.35 mm by 30 mm)

                  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.)

                  Standard DDR2 240-pin DIMMs are available in DDR2 PC2-3200 SDRAM, DDR2 PC2-4200 SDRAM, DDR2 PC2-5300 SDRAM, and PC2-6400 SDRAM.

                  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.

                  Ballistix and Ballistix Tracer 240-pin DIMMs

                  Our high-performance Ballistix 240-pin DIMMs come in DDR2 PC2-5300 SDRAM, DDR2 PC2-6400 SDRAM, and DDR2 PC2-8000 SDRAM. The Ballistix Tracer illuminated, activity-indicating high-performance 240-pin DIMM comes in SDRAM, DDR2 PC2-6400 SDRAM, and DDR2 PC2-8000 SDRAM

                  For more information about the Ballistix memory line, please visit the Ballistix section of our Web site.

                  Ballistix 240-pin DIMM
                  Ballistix 240-pin DIMM for DDR2 memory

                  Approximately 5.25 in. by 1.18 in. (133.35 mm by 30 mm)

                  Ballistix Tracer 240-pin DIMM
                  Ballistix Tracer 240-pin DIMM for DDR2 memory

                  Approximately 5.25 in. by 1.18 in. (133.35 mm by 30 mm)