Acer Altos R910 - Manual (Page 179)

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a During system bootup, enter the System Options Menu. See
“System options menu” on page 90.
b Use the up and down arrow keys to select BIOS Setup Utility,
then press Enter. The BIOS main menu displays on the
monitor.
2 Use the up and down arrow keys to select the Memory menu,
then press Enter. The Memory menu appears.
3 Use the up and down arrow keys to select Configure Memory
RAS and Performance, then press Enter. The Configure Memory
RAS and Performance menu appears.
4 Set the Desired Memory Configuration to either Max
Performance or Maximum Compatibility.
5 Select View Configuration Details.
• Make sure Configuration Possible indicates Yes. If the
option indicates No, you may need to install more memory to
meet the requirements of the selected configuration.
• Make sure that Sparing indicates Yes.
6 Return to the Memory menu option and set the Sparing
Threshold value from 1 through 15.
7 Select View and Configure Memory Board X option (where X is
the memory board that is being configured).
Make sure that Board Status indicates Healthy.
8 Set the Reserve Rank for Spare to Enabled.
9 Press F10 to save changes and exit.
10 Press Y to confirm. The server reboots to activate the changes.