The Sun 501-6963 is a dual-processor CPU/memory board featuring two UltraSPARC IV processors running at 1.35GHz. This module mounts in Sun's enterprise server platforms, providing shared L2 cache and integrated memory controllers for legacy SPARC-based systems. The board supports standard UltraSPARC IV pin compatibility and integrates with Sun's 64-bit computing architecture. Typical applications include high-performance workstations, scientific computing environments, and legacy enterprise servers where SPARC processing is required. The dual-core configuration supports symmetric multiprocessing for parallel workloads. This refurbished unit has been tested and guaranteed functional, available via quote.