KOMPUTERBAY 512MB SDRAM DIMM (168 Pin) 133Mhz PC133 DESKTOP MEMORY 512MB PC133 SDRAM DIMM SDRAM (Synchronous DRAM). 133 Mhz (backward compatible with PC 100/66). Operating voltage: 3.3V. 168 PIN DIMM (DUAL IN-LINE MEMORY) COMPATIBLE WITH DESKTOPS Lifetime Warranty