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This setting is disabled for many computers because the motherboard is not capable of supporting this feature.
Retest All
Click this button to retest all graphic bus capabilities. All tests and diagnostics are initiated immediately following a system restart.
Any settings that have previously been set to Off will be turned on, providing the test passes.
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Problems can arise if the user enables a secondary graphics accelerator (in a multiple monitor environment) after the operating system has loaded. The problem exists because the secondary graphics card is enabled after the SMARTGART diagnostic test have been run. To ensure system stability you should restart the computer after the secondary graphics accelerator is enabled so that both graphics accelerators can be tested with SMARTGART.
