Product Details Module Name: PC2-5300F Speed: 667 MHz Data Integrity Check: ECC Capacity: 4GB Condition: Fully Tested, Refurbished Warranty:1 Year Warranty Each 4GB DDR2 667MHz PC2-5300F Fully Buffered memory module has been tested to ensure the best quality for all customers. To boost your server's performance buy your 4GB 667MHz PC2-5300F upgrade today!