Installing Memory Options - IBM eServer 250 xSeries Installation Manual

Installing memory options

Connector 1(J1)
Connector 2 (J2)
Connector 3 (J3)
Connector 4 (J4)
Connector 5 (J5)
Connector 6 (J6)
Connector 7 (J7)
Connector 8 (J8)
22
IBM® xSeries 250: Installation Guide
Before you install memory, review the following:
• 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.
• The memory board contains 16 DIMM connectors and supports 4-way memory
interleaving.
• 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 128 MB, 256 MB, 512 MB and 1 GB (when
available) DIMMs.
Note: If you install 64 MB DIMMs, they will not support the Chipkill memory
function.
• 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.
• 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 that you have installed.
• 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. See
the User's Reference on the IBM xSeries Documentation CD for more information.
• Install the DIMMs in the order provided in Table 2.
Set of 4 DIMMs
First set (shipped as standard)
2nd set
3rd set
4th set
Table 2. DIMM installation order.
The following illustration shows the location of the DIMM connectors.
Note: The illustrations in this book might differ slightly from your hardware.
install DIMMs in these connectors:
J1, J5, J9, J13
J2, J6, J10, J14
J3,J 7,J 11,J 15
J4, J8, J12, J16
Connector 9 (J9)
Connector 10 (J10)
Connector 11 (J11)
Connector 12 (J12)
Connector 13 (J13)
Connector 14 (J14)
Connector 15 (J15)
Connector 16 (J16)