System capacity(in GB) DIMM size (inGB) Number ofDIMMs Organization andspeed DIMM slot population256 16 16 2R x4, 2133 MT/s A1, A2, A3, A4, B1, B2, B3,B4, C1, C2, C3, C4, D1,D2, D3, D4384 16 24 2R x4, 2133 MT/s A1, A2, A3, A4, A5, A6, B1,B2, B3, B4, B5, B6, C1, C2,C3, C4, C5, C6, D1, D2,D3, D4, D5, D6512 32 16 4R, x4, 2133 MT/s2R, x4, 2133 MT/sA1, A2, A3, A4, B1, B2, B3,B4, C1, C2, C3, C4, D1,D2, D3, D4768 32 24 4R, x4, 2133 MT/s2R, x4, 2133 MT/sA1, A2, A3, A4, A5, A6, B1,B2, B3, B4, B5, B6, C1, C2,C3, C4, C5, C6, D1, D2,D3, D4, D5, D61024 32 32 4R, x4, 2133 MT/s2R, x4, 2133 MT/sA1, A2, A3, A4, A5, A6, A7,A8, B1, B2, B3, B4, B5, B6,B7, B8, C1, C2, C3, C4, C5,C6, C7, C8, D1, D2, D3,D4, D5, D6, D7, D81536 32 48 4R, x4, 1866 MT/s2R, x4, 1866 MT/sA1, A2, A3, A4, A5, A6, A7,A8, A9, A10, A11, A12, B1,B2, B3, B4, B5, B6, B7, B8,B9, B10, B11, B12, C1, C2,C3, C4, C5, C6, C7, C8,C9, C10, C11, C12, D1, D2,D3, D4, D5, D6, D7, D8,D9, D10, D11, D12I/O module mezzanine cardsYour system supports a variety of optional mezzanine cards. If installed, the mezzanine card(s) must beused in conjunction with a matching I/O module(s).For more information on I/O modules, see "Guidelines for Installing I/O Modules" in the M1000eEnclosure Owner's Manual at dell.com/support/home.Mezzanine card installation guidelinesThe blade supports up to four mezzanine cards:• Mezzanine card slot C supports Fabric C. This card must match the fabric type of I/O modulesinstalled in I/O module bays C1 and C2.• Mezzanine card slot B supports Fabric B. This card must match the fabric type of I/O modulesinstalled in I/O module bays B1 and B2.The blade supports SFF mezzanine cards. x8 PCIe Gen 3 cards are supported.56