Datasheet

Cisco UCS C460 M4 High-Performance Rack-Mount Server
58
SUPPLEMENTAL MATERIAL
Memory Population Rules
When considering the memory configuration of your server, you should observe the following:
■ Only 1 memory riser on any CPU is required to boot the system.
■ Memory risers on non-installed CPUs will not work.
■ Memory risers do not need to be populated in pairs
■ If not installing all risers, for optimal CPU air flow, even numbered risers should be installed
first.
■ Each memory riser has two memory buffers, each of which controls two DDR channels with
up to 3 DIMMs per channel.
■ For optimal performance DIMMs should be spread evenly across all CPUs and DDR channels
■ DIMM1 of a channel should be installed first (blue socket), then DIMM2 (white socket), then
DIMM3 (black socket)
Memory Population Order
When populating DIMMs on the memory riser cards, observe the population order shown in the following
tables:
■ Population order for 4 CPUs and 8 risers: see Table 39 on page 59.
■ Population order for 2 CPUs and 4 risers: see Table 40 on page 63.