Sun 501-6334 CPU/Memory board featuring dual 900MHz processors designed for Fire V480 and V880 server systems. This UltraSPARC III-based board ships without DIMM population (0GB base configuration) but supports memory expansion via compatible SDRAM modules. Form factor integrates directly into Fire V480/V880 backplane architecture with standard UPA+ interconnect. Typical deployment includes mid-range enterprise Unix environments, database servers, and departmental application hosting. Board compatibility limited to specified Fire series; verify existing board revision before installation. Tested and guaranteed; available via quote.