Acrosser AR-B1894 - Manual (Page 44)

4.2.8Frequency/Voltage Control
4.2.8.1 Auto Detect PCI/DIMM Clk
This item allows to enable/disable auto detect PCI/DIMM clock.
4.2.8.2 Spread
Spectrum
This is to adjust extreme value of the pulse for EMI test.
4.2.9Load Fail-Safe Default
Use this menu to load the BIOS default values for the minimal/stable
performance for your system to operate.
Press to load the BIOS default values for the most stable, minimal-
performance system operations.