Infineon 1GB (128x72) SDRAM PC-133 ECC Registered 168-Pin DIMM Infineon 1 GB (128Mx72) SDRAM PC-133 ECC Registered 168-Pin DIMM General Features: 1024 MB (1GB) SDRAM DIMM PC-133 128M x 72 168-pin ECC Registered CL3 Regulatory Approvals: UL NOTE: ECC RAM is intended for use in mission critical work systems, such as servers and workstations. This ECC RAM is not intended for use in most desktop and notebook motherboards, please consult your motherboard's user manual for compatibility.