46C7873 - IBM - INTEL Xeon E5540 Quadcore 2.53Ghz 1Mb L2 Cache 8Mb L3 Cache 5.86GT/S Qpi Socketb(LGa1366) 45Nm 80W Processor Only For Systems X3400 M2, X3500 M2, X3400 M3, X3500 M3

46C7879 - IBM - INTEL Xeon E5506 Quadcore 2.13Ghz 1Mb L2 Cache 4Mb L3 Cache 4.8GT/S Qpi Speed Socket FcLGa1366 45Nm 80W Processor Only For Systems X3400 M2 / X3500 M2 / X3400 M3 / X3500 M3

46D1407 - IBM - Heatsink for x3400 M2 x3500 M2 x3400 M3 x3500

44X1745 - IBM - Heatsink for x3400 M2 x3500 M2 x3400 M3 x3500

536893-001 - HP - INTEL Xeon E5520 Quadcore 2.26Ghz 1Mb L2 Cache 8Mb L3 Cache 5.86GT/S Qpi Socketb(LGa1366) 45Nm 80W Processor Only For Server

46M1038 - IBM - Intel Xeon E5540 Quad-core 2.53ghz 1mb L2 Cache 8mb L3 Cache 5.86gt/s Qpi Socket-b(lga-1366) 45nm 80w Processor Only For Systems X3550 M2, X3550 M3, X3650 M2, X3650 M3

P026R - Dell - INTEL Xeon X5570 Quadcore 2.93Ghz 1Mb L2 Cache 8Mb L3 Cache 6.4GT/S Qpi Socketb(LGa1366) 45Nm 95W Processor Only