Komputerbay 512MB SDRAM DIMM (168 Pin) 133Mhz PC133 FOR Lenovo PC 300 GL 6563-C2U (non-ECC) 512MB Komputerbay 512MB SDRAM DIMM (168 Pin) 133Mhz PC133 FOR Lenovo PC 300 GL 6563-C2U (non-ECC) 512MB SDRAM (Synchronous DRAM). 133 Mhz (backward compatible with PC 100/66). Operating voltage: 3.3V. 168 PIN DIMM (DUAL IN-LINE MEMORY 64 X 4) COMPATIBLE WITH Lenovo PC 300 GL 6563-C2U (non-ECC) Lifetime Warranty