Dell PowerVault DX6104 Owner's Manual page 41

The system contains 12 memory sockets split into two sets of six sockets, one set per processor. Each six-socket set is
organized into three channels. In each channel, the release levers of the first socket is marked white and the second
black.
NOTE: DIMMs in sockets A1 to A6 are assigned to processor 1 and DIMMs in sockets B1 to B6 are assigned to
processor 2.
Figure 11. Memory Socket Locations
Memory channels are organized as follows:
Processor 1 channel 1: memory sockets A1 and A4
channel 2: memory sockets A2 and A5
channel 3: memory sockets A3 and A6
Processor 2 channel 1: memory sockets B1 and B4
channel 2: memory sockets B2 and B5
channel 3: memory sockets B3 and B6
41