Amazon.com: OWC 32.0GB (4 X 8GB) ram Memory Upgrade kit DDR3 1333 mhz ECC PC 10600 SDRAM ECC, Compatible with 2009-2012 Mac Pro 'Nehalem' & 'Westmere' Models and PC desktops and laptops
Amazon.com: 1333mhz ddr3 memory module
Kingston 8 GB SO-DIMM 1333 MHz PC3-10600 DDR3 SDRAM Memory (KVR13S9S8K2/8) for sale online | eBay