4GB Black Diamond Memory Module for Compaq Pavilion GT Series g7 (Intel DDR3) DDR3 SO-DIMM 204pin PC3-8500 1066MHz Upgrade System Specific Memory - Newegg.com
Kingston Technology 4 GB DIMM Memory 1066 MHz (PC3-8500) 240-Pin DDR3 SDRAM Single (Not a kit) KTD-XPS730A/4G at Amazon.com