Lenovo System x3250 M5, Инструкция по установке и обслуживанию

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• Confirm that the server supports the DIMM that you are installing (see
http://www.lenovo.com/us/en/serverproven/).
• When you install or remove DIMMs, the server configuration information changes. When you restart the
server, the system displays a message that indicates that the memory configuration has changed. You
can use the Setup utility to view the server configuration information, see “Using the Setup utility” on
page 89 for more information.
• The server supports only industry-standard double-data-rate 3 (DDR3), 1333 or 1600 MHz, PC3L-12800
(single-rank or dual-rank), unbuffered or synchronous dynamic random-access memory (SDRAM) dual
inline memory modules (DIMMs) with error correcting code (ECC).
• The server supports a maximum of four single-rank or dual-rank unbuffered DIMMs.
• The maximum operating speed of the server is determined by the slowest DIMM in the server.
• If you install a pair of DIMMs in DIMM connectors 1 and 3, the size and speed of the DIMMs that you
install in DIMM connectors 1 and 3 must match each other. However, they do not have to be the same
size and speed as the DIMMs that are installed in DIMM connectors 2 and 4.
• You can use compatible DIMMs from various manufacturers in the same pair.
• The specifications of a DDR3 DIMM are on a label on the DIMM, in the following format.
• gGBeRxf PC3 v - wwwwwm - aa - bb - cc
where:
– gGB is the total capacity of the DIMM (for example, 1GB, 2GB, or 4GB)
– eR is the number of ranks
– 1R = single-rank
– 2R = dual-rank
– 4R = quad-rank
– xf is the device organization or bit width (for example, x4, x8, or x16)
– x4 = x4 organization (4 DQ lines per SDRAM)
– x8 = x8 organization
– x16 = x16 organization
– v is the SDRAM and support component supply voltage (VDD)
– Blank = 1.5 V specified
– L = 1.35 V specified, 1.5 V operable
Note: Values for these voltages are ‘specified’ which means the device characteristics such as timing
are supported at this voltage. Values are ‘operable’ which means that the devices can be operated
safely at this voltage. However, device characteristics such as timing may not be guaranteed. All
devices must be ‘tolerant’ of the highest DDR3 nominal voltage of 1.5 V, meaning that they may not
operate at 1.5 V but may be powered at that voltage without damage to the devices.
– wwwww is the DIMM bandwidth, in MBps
• 6400 = 6.40 GBps (DDR3-800 SDRAMs, 8-byte primary data bus)
• 8500 = 8.53 GBps (DDR3-1066 SDRAMs, 8-byte primary data bus)
• 10600 = 10.66 GBps (DDR3-1333 SDRAMs, 8-byte primary data bus)
• 12800 = 12.80 GBps (DDR3-1600 SDRAMs, 8-byte primary data bus)
– m is the DIMM type
• E = Unbuffered DIMM (UDIMM) with ECC (x72-bit module data bus)
• R = Registered DIMM (RDIMM)
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Lenovo System x3250 M5Installation and Service Guide