Memory Module 4GB, 1066MHz, DDR3, ECC, 1x4GB
Apple Mac Pro Memory Module 4GB, 4 GB, 1 x 4 GB, DDR3, 1066 MHz
Apple Mac Pro Memory Module 4GB. Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR3, Memory clock speed: 1066 MHz, ECC