FIGURE 2-5 Locating DIMM Slots
Populate DIMMs in matching pairs, starting with Pair 0, then adding Pair 1, then Pair 2.
There are two channels, Channel A and Channel B. DIMMs are identified as A0, B0, A1, B1, A2, and B2. Where Pair 0 would be A0 and B0, and so on.