Product Detail 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 Each 240-pin DIMM provides a 72-bit for ECC or registered or fully buffered modules . The "Crucial CT2KIT51272AB667 8GB 4GBx2 240-pin DIMM DDR2 PC2-5300 Memory Module" is best product for you. We recommended Crucial CT2KIT51272AB667 8GB 4GBx2 240-pin DIMM DDR2 PC2-5300 Memory Module