Memory Upgrades Memory 1 GB SO DIMM 200pin DDR II 667 MHz / PC25300 1.8 V Memory Module Manufacturer OEM Guaranteed 100% Compatibility Module Capacity 1GB Module Configuration 128Meg x 64 Data Rate DDR2- 667MHZ No. Sides &amp; No. Chips Double sided, 8 Chips Speed PC2-5300 CAS Latency CL=5 / 1.8V Pin Count &amp; Package 200PIN SODIMM Version &amp; Type Unbuffered, Non-ECC Backward Compatibility PC2-4200