Dell E19S, R520 owner manual Memory channels are organized as follows, Processor

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 16. 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

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