Frequency Settings• CPU Freq, MHzThis value is set by the CPU Multiplier (value cannot be changed by the user).• FSB Reference Clock, MHzThis value is set by the system (value cannot be changed by the user). To changethe SLI-Ready memory, FSB memory, and memory timing, go to the FSB &Memory screen.• CPU MultiplierThis value changes the CPU Frequency value depending on the value you choose. Usethe Page Up and Page Down keys to scroll through the options. The options are from6 X through 60 X.• PCIe x16_1, MHzUse the Page Up and Page Down keys to scroll through the frequency options for thePCI Express Bus, Slot 1 (the black slot closest to the CPU). Note that as you go higherin value, PCIe Spread Spectrum(SPP) is disabled and cannot be changed fromthis status.• PCIe x16_2, MHzUse the Page Up and Page Down keys to scroll through the frequency options for thePCI Express Bus, Slot 3 (the black slot farthest from the CPU).• SPP<—>MCP Ref Clock, MHzUse the Page Up and Page Down keys to scroll through the frequency options for thereference clock between the SPP chip and the MCP chip.42Installing and Configuring the BFG NVIDIA nForce 680i LT SLI Motherboard
