Compaq 128MB SDRAM Non ECC PC-133 CL3 133Mhz DIMM Memory Module (140133-001). This is a seller refurbished part in great condition. May show signs of cosmetic wear but this should not interfere with the effectiveness of the product. 140133-001 is a SDRAM Module. SDRAM Modules run from 100 to 166 MT/s (million transfers per second). This is a 128MB module. Contains a PC-133 Memory Bus Type. Does not correct errors when they occur, it is a Non-ECC part. The data transfer rate for this specific part is 133 Mhz.