IBM 81Y5945 INTEL XEON E5645 SIX-CORE 2.4GHZ 1.5MB L2 CACHE 12MB L3 CACHE 5.86GT/S QPI SPEED SOCKET-FCLGA1366 32NM 80W PROCESSOR ONLY FOR SYSTEMS X3400 M2, X3500 M2, X3400 M3, X3500 M3. SYSTEM PULL. IN STOCK.