16GB (2X8GB) PC RAM MODULE KIT DDR3 1066MHZ PC3-8500 UNBUFFERED NON-ECC 1.5V 512X8 CL7 INTEGRAL
Amazon.com: OWC 16GB (2 x 8GB) PC8500 DDR3 ECC-R 1066MHz DIMMs Memory Compatible with Mac Pro Early 2009 & Late 2010 'Nehalem' & 'Westmere' Systems and Early 2009 Xserve. (OWC85MP3S8M16GK) : Everything Else
Mac Pro Ram - 1066MHz DDR3 ECC 16GB module (09/10) PC3-8500
16GB 2X8GB Memory RAM for IBM Flex System x240 Black Diamond Memory Module 240pin PC3-8500 1066MHz DDR3 ECC Registered RDIMM Upgrade System Specific Memory - Newegg.ca