MEM FUJITSU-SIEMENS 1GB DDR2-667 NON-ECC. RAM Technology DDR2 SDRAM. RAM / Memory Speed 667 MHz. RAM Form Factor DIMM 240-pin. RAM / Storage Capacity 1 GB. Data Integrity Check non ECC. Our most popular model. 100% safe & secure shopping; Superior customer service. Notice: Customers should thoroughly inspect all cartons for damage before signing for the shipment. Damage: Must be reported within 15 days from delivery date. Shortage/Fallout: Must be reported within 15 days from delivery date. Loss: Must be reported within 30 days from ship-date. If you have any other questions about the product, please contact us any time.