IBM 35P1326 4GB DIMM memory module for enterprise server infrastructure. DDR form factor with standard 240-pin DIMM connector, compatible with IBM System x and xSeries server platforms requiring registered or unbuffered memory configurations. Rated for reliable operation in high-availability data center environments. Typical applications include expanding memory capacity in x3250, x3400, x3500, and related IBM server generations. Module tested and guaranteed functional; available via quote.