HYNIX 2GB PC3-10600U DDR3 MEMORY MODULE HMT325U6BFR8C-H9 at Amazon.com
MT16JTF51264AZ-1G6M1 MICRON 4GB 2Rx8 PC3-12800U Memory Module (1x4GB) at Amazon.com
Hynix 4GB PC3-12800 DDR3 1600MHz Non-ECC Unbuffered HMT351S6CFR8C-PB at Amazon.com
Pc310600s Cheap Sale, UP TO 53% OFF
Amazon.com: SK Hynix 4GB 2RX8 PC3-12800E 1600MHZ HMT351U7CFR8C-PB 00D4957 00D4955 47J0180 Compatible with IBM System x3100 M4 IBM System x3250 M4 : Electronics