Crucial 4GB (2GBx2) DDR3 PC3-10600 Memory (CT2KIT25664BA1339)

Nov 21st, 2010 | By Simon


While most companies come up with fancy names for each of their products, Crucial cuts to the chase and sticks with the technical details. The name CT2KIT25664BA1339 is definitely a mouthful of characters but it makes perfect sense to the eyes of an engineer. Without getting into too much detail we have a 2 stick kit with 256MB ICs providing a 64-bit data path. It’s DDR-1333 at CAS 9. It’s unbuffered and operates at a typical 1.5V. More information about the kit is available at .

Here’s what they have to say about their own kit:

Crucial 240-pin DIMMs are used in DDR3 memory for desktop computers. DDR3 is the latest generation of memory with an improved architecture that allows it to transmit data more quickly.

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.

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 DDR3 240-pin DIMMs are currently available in DDR3 PC3-8500 SDRAM. Additional speeds will be added as the technology becomes available.

To use DDR3 memory, your system motherboard must have 240-pin DIMM slots and a DDR3-enabled chipset. This is because a DDR3 SDRAM DIMM will not fit into a standard DDR2 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 DDR3 DIMMS, 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 specifications I broke down from the module can be read here:

Crucial CT2KIT25664BA1339

We can see the Micron logo etched onto each module. The D9LGK isn’t widely used in the industry, the only other company I’ve seen with this chip is Avant Technology and they also use it in a DDR3-1333 product.

Crucial CT2KIT25664BA1339

I was not surprised to see that this kit is JEDEC compliant. Is anyone not these days?

Crucial CT2KIT25664BA1339

Generally speaking, for a budget kit the Crucial CT2KITt25664BA1339 is well positioned. It’s priced two or three dollars more than some of the competition but with Crucial being the manufacturer and seller you know you’re going to get a product with a little more power than what the label says.


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