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