A-Tech 16GB (2x8GB) RAM for HP EliteDesk 800 G1 SFF/Tower | DDR3 1600MHz PC3-12800 Non ECC DIMM 2Rx8 1.5V - Desktop Memory Upgrade Kit at Amazon.com
Global Memory 8GB (2 x 4GB) DDR3 800/1066/1333/1600/1866MHz 240-PIN ECC DIMM (UDIMM) Memory Ram Kit for Servers/Workstations/Motherboards at Amazon.com
34046055 - DIMM, 2GB, DDR3-800, LOW IDD6, FAS25XX
OFFTEK 8GB Replacement Memory RAM Upgrade for HP-Compaq EliteDesk 800 G1 (Ultra-Slim) (DDR3-12800) Desktop Memory at Amazon.com