Artesyn Embedded Technology ATCA-7490, Installation And Use Manual

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Hardware Preparation and Installation
ATCA-7490 Installation and Use (6806800U11F )
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Only qualified DDR4 DIMMs (Single Ranked or Dual Ranked RDIMM) are allowed; because of
the thermal limit or budget of the blade and the high variation of the power consumptions of
different DIMM types. For thermal reasons, no 4-rank DIMMs and no dual-Die DIMMs are
allowed.
Table 2-7 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.

When mixing DIMMs of different speed selections, BIOS set up the lowest speed
for all memory channels/DIMM slots on per CPU level basis. For more information,
refer to
DDR4 Main Memory on page 90 .