Gigabyte GA-8I915G-MFD Manual - Page 43

English CPU Smart FAN Mode This option is available only when CPU Smart FAN Control is enabled. Auto BIOS autodetects the type of CPU fan you installed and sets the optimal CPU Smart FAN control mode for it. (Default Value) Voltage Set to Voltage when you use a CPU fan with a 3-pin fan power cable. PWM Set to PWM when you use a CPU fan with a 4-pin fan power cable. Note: In fact, the Voltage option can be used for CPU fans with 3-pin or 4-pin power cables. However, some 4-pin CPU fan power cables are not designed following Intel 4-Wire fans PWM control specifications. With such CPU fans, selecting PWM will not effectively reduce the fan speed. 2-7 MB Intelligent Tweaker(M.I.T.) CMOS Setup Utility-Copyright (C) 1984-2004 Award Software MB Intelligent Tweaker(M.I.T.) CPU Clock Ratio Memory Frequency For Memory Frequency (Mhz) [15X] [Auto] 533 Item Help Menu Level` KLJI: Move Enter: Select F5: Previous Values +/-/PU/PD: Value F10: Save F6: Fail-Safe Default ESC: Exit F1: General Help F7: Optimized Defaults Incorrect using these features may cause your system broken. For power end-user use only. CPU Clock Ratio This setup option will automatically assign by CPU detection. The option will display "Locked" and read only if the CPU ratio is not changeable. Memory Frequency For Wrong frequency may make system can't boot, clear CMOS to overcome wrong frequency issue. for FSB(Front Side Bus) frequency=533MHz, 3.0 Memory Frequency = Host clock X 3.0. 4.0 Memory Frequency = Host clock X4.0. Auto Set Memory frequency by DRAM SPD data. (Default value) for FSB(Front Side Bus) frequency=800MHz, 2.0 Memory Frequency = Host clock X 2.0. 2.66 Memory Frequency = Host clock X 2.66. Auto Set Memory frequency by DRAM SPD data. (Default value) Memory Frequency (Mhz) The values depend on "Memory Frequency For" item. - 43 - BIOS Setup