DDR2 2GB 2RX8 PC2-6400S Adata - 500DDR3-1333 1GB 128MX8 kingston? - 300DDR3 2GB 2RX8 PC3-10600S kingston - 500DDR3 2GB 1RX8 PC3-10600S elpida - 500DDR4 2GB 1Rx16 PC4-2400T hynix - 500