24.0GB (3 X 8GB) OWC PC8500 DDR3 1066MHZ ECC DIMM MEMORYOTHER WORLD COMPUTING OWC 24GB DDR3 SDRAM Memory Module 24 GB (3 x 8GB) DDR3 1066 PC3 8500 DDR3 SDRAM 1066 MHz CL7 1. 50 V ECC 240 pin DIMM VPN: OWC85MP3W8M24K SKU: RSC368264 UPC: 24 GB of memory can produce approx. 10K MIPS and as a result, your system gets more room to run complex apps. 1066 MHz speed and CL7 latency to execute routine softwares at a steady pace 240 pin pin DDR3 SDRAM operates at an effective bus speed with minimal power consumption