![](/images/new-backgrounds/1196610/196610245x1.webp)
Figure 4-1 Enabling memory mirroring
3.Select the SMP Expansion Module you want memory mirroring enabled on and press the right arrow key to change the value to Enabled.
Tip: In a server with two SMP Expansion Modules installed, it is possible to enable memory mirroring in only one SMP Expansion Module; however, we do not recommend this configuration.
4.Exit the System Configuration Utility and save any changes.
5.Once memory mirroring is enabled, you will the following message during POST:
Active Memory(tm) Mirroring enabled on CEC1
4.1.3Enabling Hyper-Threading
There are a number of important factors to consider before enabling
Chapter 4. Installation 109