Asus Maximus VI Extreme Manual page 43

6. PCIe x16 Lane switch
This DIP switch allows you to enable and disable the corresponding PCIe x16 slots.
When one of the installed PCIe x16 cards is out of order, you can slide the switch to
find out the faulty one without removing the cards.
7. Fast Boot switch
This switch allows you to enable or disable the Fast Boot feature. When enabled, the
system boot speed is accelerated.
ASUS MAXIMUS VI EXTREME
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