Product Details Module Name: PC3-8500R Speed: 1066 MHz Data Integrity Check: ECC Kit Storage Capacity: 512GB (64 x 8GB) Condition: Fully Tested, Refurbished Warranty:1 Year Warranty Each 8GB DDR3-1066 MHz PC3-8500R ECC Registered Server Memory Kit has been tested to ensure the best quality for all customers. To boost your server's performance buy your 144GB PC3-8500R upgrade today!