When SLI or Crossfire (more so with SLI than Crossfire) changes state (i.e. from on to off during driver installation), the monitor resolutions and numbers change temporarily. This may cause Fences, if configured to do so, to move the Fences and resize them to the primary monitor. Occasionally I have seen them move to other than the primary monitor and almost always happens when installing a new driver but not disabling multi-GPU support first. There is an easy work around for this however it disables the auto-layout on resolution changes.
- Right click on the desktop or a Fence and select Configure Fences.
- Select the Layout and snapping link on the left under Features.
- In the Layout auto-adjustments section under On screen resolution changes... select the Don't preserve my desktop layout radio button.
- Click the close icon on the title bar to save and exit.