5457-A3C:

x3100 M5, 4U Tower, Intel Pentium G3440 3.3GHz 2C, 4GB UDIMM, 4 DIMMs MAX, Open Bay, 4x3.5" SS SATA, Server Raid C105 Raid 0,1, DVD-ROM, 2x1Gb, 1x350W Fixed, 3x7x24x4

5457-I21:

x3100 M5, 4U Tower, Intel Xeon E3-1220 v3 4C 3.1GHz, 8GB UDIMM, 4 DIMMs MAX, Open Bay, 4x3.5" SS SATA, Server Raid C105 Raid 0,1, DVD-ROM, 2x1Gb, 1x350W Fixed, 3x7x24x4

5457-I41:

x3100 M5, 4U Tower, Intel Xeon E3-1241 v3 4C 3.5GHz, 8GB UDIMM, 4 DIMMs MAX, Open Bay, 4x3.5" SS SATA, Server Raid C105 Raid 0,1, DVD-ROM, 2x1Gb, 1x350W Fixed, 3x7x24x4