Artesyn ATCA-7480 Installation and Use (February 2015) - Manual (Page 54)

Hardware Preparation and Installation
ATCA-7480 Installation and Use (6806800T17A) 54
Each processor provides four memory channels with two DIMM sockets each. When installing
DIMM memory modules, the DIMM sockets, which are farthest away on each memory channel
from the CPU device, need to be populated first:
Table 2-8 DIMM Sockets
CPU
Memory
channel
DIMM socket
Primary Secondary
CPU#0 A J11 J12
B J13 J14
C J15 J16
D J17 J18
CPU#1 E J21 J22
F J23 J24
G J25 J26
H J27 J28
For optimal performance, all memory channels A through H should be populated and also a
balanced DIMM configuration is recommended; that is, every memory channel using the
same type and amount of DIMMs.
In case of using only one DIMM per channel, make sure that you use only primary sockets
and leave the secondary sockets empty.