The Sun 501-4882-07 Cpu/Memory Board 501-4882-07, 270-4312-02 Rev.50 is in in stock at Calhoun Technologies. For over 10 years Calhoun Technologies has been saving companies likes your up to 80% off list price on hard to find computer hardware. Manufacturer: Sun Part Number: 501-4882-07 Details: Sun 501-4882-07 Cpu/Memory Board 501-4882-07, 270-4312-02 Rev.50