Crucial CT51264BA160B 4GB, 240-pin DIMM, DDR3 PC3-12800 Memory
Module

Product Description

Crucial 240-pin DIMMs are used in DDR3 memory for desktop computers. DDR3 is the latest generation of memory with an enhanced 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 & a socket on a larger printed circuit board. The pins on the front & 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 & Ballistix Tracer high-performance memory do not come in 72-bit or registered modules.) Standard DDR3 240-pin DIMMs are currently available in PC3-8500 (DDR3 1066 M Hz) & PC3-10600 (DDR3 1333 M Hz) speeds. Additional speeds will be added as the technology becomes available. To use DDR3 memory, your system motherboard must have 240-pin DIMM slots & 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 & 120 pins on the back, for a total of 240. 240-pin DIMMs are Approx. 5.25 inches long & 1.18 inches high, though the heights can vary. While 240-pin DDR3 DIMMS, 240-pin DDR2 DIMMs, 184-pin DDR DIMMs, & 168-pin DIMMs are Approx. the same size, 240-pin DIMMs & 184-pin DIMMs have only one notch within the row of pins.