Lenovo Intel Xeon E5503, Intel® Xeon® 5000 Sequence, Socket B (LGA 1366), Tray, E5503, 2 GHz, 64-bit Lenovo Intel Xeon E5503. Processor family: Intel® Xeon® 5000 Sequence, Processor socket: Socket B (LGA 1366), Package type: Tray. Market segment: Server