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If you have other devices to install or remove, do so now. Otherwise, go to
"Completing the installation" on page 71.
Memory modules
The following notes describe the types of dual inline memory modules (DIMMs) that
the server supports and other information that you must consider when you install
DIMMs:
v The server supports 1.5 V, 240-pin, 1 GB and 2 GB PC3-10600 or 4 GB, 8 GB,
v The server supports up to eight memory cards. Each memory card holds up to
v At least one memory card with one pair of DIMMs must be installed for the
v When you install additional DIMMs on a memory card, be sure to install them in
v You do not have to save new configuration information to the IMM when you
v When you restart the server after you add or remove a DIMM, the server
v Memory cards in connectors 1 and 2 support microprocessor 1, memory cards in
v There are four memory power buses, which are split among the eight memory
v Populate the memory-card connectors to match the microprocessor installation,
58
IBM System x3850 X5 and x3950 X5 Types 7145 and 7146: Installation and User's Guide
and 16 GB PC3-8500 double data-rate (DDR) III, registered synchronous
dynamic random-access memory (SDRAM) with error correcting code (ECC)
DIMMs. These DIMMs must be compatible with the latest PC3-10600 or
PC3-8500 SDRAM Registered DIMM specifications. For a list of the supported
optional devices for the server, see http://www.ibm.com/servers/eserver/
serverproven/compat/us/.
eight DIMMs.
server to operate.
pairs. The DIMMs in each pair must match each other.
install or remove DIMMs. The only exception is if you replace a DIMM that was
designated as disabled in the Setup utility Memory Settings menu. In this case,
you must re-enable the row in the Setup utility or reload the default memory
settings.
displays a message that the memory configuration has changed.
connectors 3 and 4 support microprocessor 2, memory cards in connectors 5 and
6 support microprocessor 3, and memory cards in connectors 7 and 8 support
microprocessor 4.
cards.
in the following order: 1, 7, 3, 5, 2, 8, 4, 6. (Microprocessors must be installed in
the following order: 1, 4, 2, and 3. See "Installing a microprocessor" on page 67
for more information.)
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