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In Stock

Order within for delivery on Tuesday, 1st December

Crucial 4GB DDR2 800MHz Memory

  • 2 x 2GB Kit
  • PC2-6400
  • CL6 1.8V
  • Limited Lifetime Manufacturer Warranty

View full description

QuickFind: 142403

Mfr part code: CT2KIT25664AA800

Crucial 4GB DDR2 800MHz Memory Product Description

240-pin DIMM

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.

Crucial 4GB DDR2 800MHz Memory Product Reviews

Technical Specifications


Memory Speed 800 MHz ( PC2-6400 )
RAM Features Unbuffered
Supply Voltage 1.8 V
Technology DDR2 SDRAM
Form Factor DIMM 240-pin
Module Height (inch) 1.18
Speed 800 MHz ( PC2-6400 )
Latency Timings CL6
Data Integrity Check Non-ECC
Features Unbuffered
Module Configuration 256 x 64
Voltage 1.8 V


Storage Capacity 4 GB : 2 x 2 GB
Capacity 4 GB : 2 x 2 GB
Upgrade Type Generic
OEM Manufacturer Equivalent Part Number IBM 46C7571, HP 501158-001, IBM 40W2991, IBM 46C7568, IBM 46M3065, Kingston KTD-PEM605/4G, Kingston KTH-BL495K2/4G, Kingston KTM5780ALP/4G, Kingston KVR800D2N5K2/4G, Kingston KVR800D2N6K2/4G

Expansion / Connectivity

Compatible Slots 2 x memory - DIMM 240-pin

Manufacturer Warranty

Service & Support Limited lifetime warranty

Customer Questions

Crucial 4GB DDR2 800MHz Memory Ask an owner

Crucial 4GB DDR2 800MHz Memory Product Discussion

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