IBM 866631Y - Netfinity 7100 - 8666 Hardware Maintenance Manual page 65

v All the DIMMs installed in each set must be the same size and speed, but all the
sets do not have to contain DIMMs of the same size and speed.
v The memory board contains 16 DIMM connectors and supports 4-way memory
interleaving.
v Install only 3.3 V, 168-pin, 8-byte, registered DIMMs. Only 100 MHz, 72-bit,
registered, synchronous, error correcting code (ECC), SDRAM configuration
DIMM memory is supported for the 64 MB, 128 MB, 256 MB, 512 MB and 1 GB
(when available) DIMMs.
v If you install 4 GB of memory, some of the memory is reserved for system
resources. The amount reserved for system resources depends on the
configuration of the server.
v If you install 16 GB of memory, the Configuration/Setup Utility will display the
memory that is usable by the network operating system. This amount of
memory might differ from the amount of memory you have installed.
v Installing or removing DIMMs changes the configuration information in the
server. Therefore, after installing or removing a DIMM, you must save the new
configuration information using the Configuration/Setup Utility program. Refer
to "Using the Configuration/Setup Utility program" on page 31 for more
information.
v Install the DIMMs in the order provided in Table 7.
v For the locations of the DIMM connectors, see "Memory board component
locations" on page 43.
Table 7. DIMM installation order
Set of 4 DIMMs
First set (shipped as standard)
2nd set
3rd set
4th set
Refer to the following illustration when installing memory.
Install DIMMs in these connectors:
J1, J5, J9, J13
J2, J6, J10, J14
J3, J7, J11, J15
J4, J8, J12, J16
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Installing options