256MB PC100 non-ECC SDRAM 168-pin DIMM -
This 256MB memory upgrade is for Apple iMac G3 350 400 500 600 700MHz for Power Mac G4 350/400/450/500MHz for Power Mac G4 Cube 450/500MHz and for Power Mac G3 Server
974872 - GVP Memory - 256MBPC100DIMM