Timetec Hynix IC 4GB DDR3 1333MHz PC3-10600 Non ECC Unbuffered 1.5V CL9 2Rx8 Dual Rank 204 Pin SODIMM Laptop Notebook Computer Memory Ram Module Upgrade (Low Density 4GB) - Walmart.com
A-Tech 8GB Kit (2X 4GB) DDR3 1333MHz PC3-10600E 2Rx8 240-pin ECC-Unbuffered DIMM for HP Workstation Z200 and Z400 – Server Memory Ram Modules at Amazon.com