Gigabyte GA-8IEXRR User Manual page 48

CReset Case Open Status
CCase Opened
If the case is closed, "Case Opened" w ill show "No".
If the case hav e been opened, "Case Opened" w ill show "Yes".
If y ou w ant to reset "C ase Opened" v alue, set "Res et Case Open Status" to
"Enabled" and sav e CMOS, y our computer w ill res tart.
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BIOS Setup