Hardware options installation 117
• When only one processor is installed, install DIMMs in sequential alphabetic order: Ch 1-A, Ch 2-B,
Ch 3-C, Ch 4-D.
• When two processors are installed, install the DIMMs in sequential alphabetical order balanced
between the two processors: P1-A, P2-A, P1-B, P2-B, P1-C, P2-C, P1-D, P2-D.
For more information about server memory, see the Hewlett Packard Enterprise website
(http://www.hpe.com/info/memory).
Advanced ECC population guidelines
For Advanced ECC mode configurations, observe the following guidelines:
• Observe the general DIMM slot population guidelines.
• DIMMs may be installed individually.
Online spare population guidelines
For Online Spare memory mode configurations, observe the following guidelines:
• Observe the general DIMM slot population guidelines.
• Each channel must have a valid online spare configuration.
• Each channel can have a different valid online spare configuration.
• Each populated channel must have a spare rank. A single dual-rank DIMM is not a valid
configuration.
Mirrored Memory population guidelines
For Mirrored Memory mode configurations, observe the following guidelines:
• Observe the general DIMM slot population guidelines.
• Install DIMMs in either channel 1 and channel 2, or channel 3 and channel 4. Installed DIMMs must
be identical in terms of size and organization.
• In multi-processor configurations, each processor must have a valid Mirrored Memory configuration.
Identifying the processor type
The processor type installed in the server is briefly displayed during POST. To view this information and
additional processor specifications, do the following:
1. Reboot the server.
The server restarts and the POST screen appears.
2. Press F9.
The System Utilities screen appears.
3. Select System Information | Processor Information.
The Processor Information screen shows detailed information about the processors installed in the
server.
4. Press Esc until the main menu is displayed.
5. Select Reboot the System to exit the utility and resume the boot process.
Installing a DIMM
1. Power down the server (on page 19).
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