MSI 815 PRO Manual page 77

Load Fail-Safe Defaults
When you press <Enter> on this item, you get a confirmation dialog box
with a message similar to:
Load Fail-Safe Defaults (Y/N) ? N
Pressing 'Y' loads the BIOS default values for the most stable, minimal-
performance system operations.
Load Optimized Defaults
When you press <Enter> on this item, you get a confirmation dialog box
with a message similar to:
Load Optimized Defaults (Y/N) ? N
Pressing 'Y' loads the default values that are factory settings for optimal
performance system operations.
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