16.0GB (4 X 4GB) PC3-10600 DDR3 1333MHZ SO-DIMM 204-PIN CL9 SO-DIMMOTHER WORLD COMPUTING OWC 16GB (4 x 4GB) DDR3 SDRAM Memory Kit For Notebook, iMac 4 GB (4 x 4GB) DDR3 1333 PC3 10600 DDR3 SDRAM 1333 MHz CL9 1. 50 V Non ECC Unbuffered, Unregistered 204 pin SoDIMM VPN: OWC1333DDR3S16S SKU: RSC885034 UPC: SoDIMM 4 GB memory allows you to have more programs open at a time 1333 MHz speed and CL9 latency to execute routine softwares at a steady pace 204 pin pin DDR3 SDRAM operates at an effective bus speed with minimal