Dell POWEREDGE C6105 - Manual (Page 132)

132 | Installing System Components
4 Install the four screws to secure the Mellanox card assembly to the
system-board assembly. See Figure 3-28.
5 Place the expansion-card bracket into the system-board assembly.
6 Replace the four screws that secure the expansion-card bracket.
7 Reconnect all the cables to the Mellanox card.
8 Replace the system-board assembly. See "Installing a System-Board
Assembly" on page 93.
System Memory
Each system board has twelve unbuffered or registered DDR3-DIMM slots
for the installation of up to twelve DDR3-800/1066/1333/1600* memory
chips to support processor 0 and processor 1. See "System Board
Connectors" on page 198 for the location of the memory modules.
NOTE: System memory working frequency is up to 1333MT/s only.
Supported DIMM Configuration
For the sequence of the twelve DIMM sockets, see Figure 3-30. When you
insert the single rank/dual rank DIMM(s), always start with DIMMA2. See
Table 3-2 for possible memory configurations.