Infineon PC2-4200U-444-11-C1 256 MB DIMM DDR2 SDRAM Memory is a computer RAM module with a total capacity of 256 MB and a bus speed of PC-4200U. It is a single module with a capacity of 256 MB and a form factor of DIMM. The brand of the module is Infineon and the type of memory is DDR2 SDRAM.