Amazon.com: Silcon Power DDR3 4 GB 1600 Mhz Low-Voltage SO DIMM RAM Memory Module for Laptop : Electronics
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model (F3-12800CL9D-8GBRL) at Amazon.com
CMS 4GB (2x2GB) DDR3 12800 1600MHz Non ECC DIMM Memory Ram Upgrade Compatible with HP/Compaq® Compaq Pro 6305 Small Form Factor Business PC - A82 at Amazon.com