256MB PC133 SO-DIMM
256MB Module - SDR SO-DIMM - Non-ECC - Unbuffered - 133MT/s - PC133 - 2ns CAS Latency - 3.3V
4GB Kit (2x2GB) DDR3-1333 PC3-10600 Non-ECC SO-DIMM
4GB Kit - (2x 2GB) - DDR3 SO-DIMM - Non-ECC - Unbuffered - 1333MT/s - PC3-10600 - 7ns CAS Latency - 1.5V