Dell PowerEdge M420 Hardware Owner's Manual - Page 161

General Memory Module Installation Guidelines - PowerEdge M910 To ensure optimal performance of your system, observe the following general guidelines when configuring your system memory: • Memory modules must be installed in pairs, beginning with the first two sockets in each set of memory modules. These sockets are marked by white retention levers. • The memory configuration for each processor must be identical. • Memory modules must be identical in size, speed, and technology in lock-step pair (same colored levers). • If quad-rank memory modules are mixed with single- or dual-rank modules, the quad-rank modules must be installed in the sockets with the white release levers. • If pairs of memory modules of different sizes are installed, the larger capacity memory modules must be installed in the lower numbered slots. • Memory mirroring and memory sparing are supported only if 32 memory modules are installed. Table 3-1. Examples of PowerEdge M910 Memory Configurations Total Physical Memory 4 GB 8 GB 16 GB 32 GB 64 GB 96 GB 128 GB 128 GB Memory Modules - Memory Module Locations Number and Type Four 1 GB A1, A2, B1, B2 Eight 1 GB A1, A2, B1, B2, C1, C2, D1, D2 Eight 2 GB A1, A2, B1, B2, C1, C2, D1, D2 Eight 4 GB A1, A2, B1, B2, C1, C2, D1, D2 Sixteen 4 GB A1, A2, A3, A4, B1, B2, B3, B4, C1, C2, C3, C4, D1, D2, D3, D4 Twenty-four 4 GB A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5, B6, C1, C2, C3, C4, C5, C6, D1, D2, D3, D4, D5, D6 Thirty-two 4 GB A1, 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, D8 Sixteen 8 GB A1, A2, A3, A4, B1, B2, B3, B4, C1, C2, C3, C4, D1, D2, D3, D4 Installing Blade Components 161