The same as these ones Newegg listed: CORSAIR Vengeance 8GB (2 x 4GB) DDR3 1600 (PC3 12800) Desktop Memory-Newegg.com
Ran 16GB total (two kits with each kit having 2 x 4GB modules) in my Sandy Bridge desktop and kept them at stock the whole time over the past 2 years.
(Price drop) $50 USD...
PM sent on Intel Xeon E5-2603v2, Asus X79 Sabretooth, Corsair H90 cooler, and 16Gb Gskill DDR3-1600 memory. Sold as one unit only. It hasn't seen much use, but some. $250