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,
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/.
v The server supports up to eight memory cards. Each memory card holds up to
eight DIMMs.
v At least one memory card with one pair of DIMMs must be installed for the
server to operate.
v When you install additional DIMMs on a memory card, be sure to install them in
pairs. The DIMMs in each pair must match each other.
v You do not have to save new configuration information to the IMM when you
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.
v When you restart the server after you add or remove a DIMM, the server
displays a message that the memory configuration has changed.
v Memory cards in connectors 1 and 2 support microprocessor 1, memory cards in
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.
v There are four memory power buses, which are split among the eight memory
cards.
v Populate the memory-card connectors to match the microprocessor installation,
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 55
for more information.)
46 IBM System x3850 X5 and x3950 X5 Types 7145 and 7146: Installation and User’s Guide
To Next Page
Loading...
Need help?
General
