IBM x3250 - System M3 - 4251 Installation And User Manual

Also see for System x3250: Installation guide User guide Specifications Problem determination and service guide

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IBM x3250 - System M3 - 4251 Installation And User Manual Manual pdf 46 page image

note of which LEDs are lit, including the LEDs that are lit on the frontpanel, on the rear panel, and LEDs inside the server on the systemboard; then, see the Problem Determination and Service Guide forinformation about how to solve the problem.3. If the server has been installed in a rack, slide the server out from the rackenclosure.4. Press down firmly on the blue tab on the top of the cover (on the right side nearthe front of the server) and slide the cover toward the rear of the server until thecover has disengaged from the chassis.Cover-releasebutton5. Lift the server cover off the server and set it aside.Attention: For proper cooling and airflow, replace the server cover before youturn on the server.Installing a memory moduleThe following notes describe the types of dual inline memory modules (DIMMs) thatthe server supports and other information that you must consider when you installDIMMs (see “System-board optional-device connectors” on page 26 for the locationof the DIMM connectors):v The server supports only industry-standard double-data-rate 3 (DDR3), 1066 or1333 MHz, PC3-8500 or PC3-10600 (single-rank, dual-rank, or quad-rank),registered or unbuffered, synchronous dynamic random-access memory(SDRAM) dual inline memory modules (DIMMs) with error correcting code (ECC).See http://www.ibm.com/servers/eserver/serverproven/compat/us/ for a list ofsupported memory modules for the server.v The maximum amount of memory that the server supports is dependent on thetype of memory that you install in the server. See “Unbuffered DIMMs (UDIMMs)”on page 31 and “Registered DIMMs (RDIMMs)” on page 33 for more information.The server supports a maximum of six single-rank or dual-rank DIMMs,depending on the type of DIMM you install in the server.v The maximum operating speed of the server is determined by the slowest DIMMin the server.v If you install a pair of DIMMs in DIMM connectors 2 and 5, the size and speed ofthe DIMMs that you install in DIMM connectors 2 and 5 must match each other.However, they do not have to be the same size and speed as the DIMMs thatare installed in DIMM connectors 1 and 4.30 IBM System x3250 M3 Types 4251, 4252, and 4261: Installation and User’s Guide