Product Detail Memory Module Manufacturer OEM Guaranteed 100% Compatibility Module Capacity 2 GB Module Module Configuration 256Meg x 64 Data Rate DDR2 No. Sides & No. Chips Double sided, 16 Chips Speed 667mhz CAS Latency CL=5 / 1.8V Pin Count & Package 240-PIN DIMM Version & Type Unbuffered, Non-ECC Motherboard Chipset Compatibility PC desktop System . The "Memory Upgrades - Memory - 2 GB - DIMM 240-pin - DDR2 - 667 MHz / PC2-5300 - CL5 - 1.8 V - unbuffered - non-ECC" is best product for you. We recommended Memory Upgrades - Memory - 2 GB - DIMM 240-pin - DDR2 - 667 MHz / PC2-5300 - CL5 - 1.8 V - unbuffered - non-ECC