Follow these steps to enable or disable X8440 Ganged or Unganged memory configurations using the BIOS Utility.
In the BIOS Utility menu bar, select ->Chipset->NorthBridge->Memory Configuration.
The Memory Configuration menu appears.
In the Memory Configuration menu, do one of the following:
To enable single-channel DIMM operation, set the Unganged Mode (Disabled) option to Enable.
Or
To enable dual-channel DIMM operation, set the Unganged Mode (Enable) option to Disable
3. In the Memory Configuration menu, do one of the following:
If you enabled a single-channel configuration in Step 2, then set the Channel Interleaving (Disabled) option to Auto.
Or
If you enabled a dual-channel DIMM configuration in Step 2, then set Channel Interleaving (Auto) to Disabled.