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240-pin DIMMs are used to provide DDR2 SDRAM memory for desktop computers.

To use DDR2 memory, your system motherboard must have 240-pin DIMM slots and a DDR2-enabled chipset. DDR2 modules use a 1.8V power supply, providing a big power saving over the 2.5V DDR modules. The number of black components on a 240-pin DIMM may vary, but they always have 120 pins on the front and 120 pins on the back.