Lenovo 5458 Installation And Service Manual page 194

v The server supports up to two single-rank or dual-rank UDIMMs per channel.
v The following table lists the supported UDIMM population.
v The following table lists the maximum DIMM population using ranked
v The following table shows the UDIMM memory population rule to optimize the
Installing a DIMM:
Use this information to install a DIMM.
Before you begin
Read the safety information in "Safety" on page v and "Installation guidelines" on
page 31.
If you are replacing a server component in the server, you need to slide the server
out from the rack enclosure, turn off the server and peripheral devices, and
disconnect the power cords and all external cables.
Attention: Static electricity that is released to internal server components when the
server is powered on might cause the server to halt, which might result in the loss
of data. To avoid this potential problem, always use an electrostatic-discharge wrist
strap or other grounding system when you work inside the server with the power
on.
About this task
The following illustration shows the location of the DIMM connectors on the
system board.
178
System x3250 M5 Type 5458: Installation and Service Guide
Table 33. Supported UDIMM population per channel
DIMM DIMMs
connectors per installed in each
channel channel
2 1
2 2
UDIMMs.
Table 34. Maximum memory population using ranked UDIMMs (depending on your model)
Number of
UDIMMs DIMM type
4 Dual-rank UDIMMs
4 Dual-rank UDIMMs
system performance.
Table 35. UDIMM population rule
DIMM connector 1 DIMM connector 2
Populated Empty
Populated Populated
DIMM type DIMM speed
Unbuffered 1600
DDR3 ECC
Unbuffered 1600
DDR3 ECC
Size
4 GB
8 GB
DIMM connector 3
Populated
Populated
Ranks per
DIMM (any
combination)
Dual-rank
Dual-rank
Total memory
16 GB
32 GB
DIMM connector 4
Empty
Populated