Tutorial on setting up a computer BIOS

The BIOS is the English "basic Input Output system" abbreviation, after literal translation after the Chinese name is "the basic input to export systems". The BIOS (Basic input/output system) is a set of programs that are solidified in a computer's CMOS RAM chip to provide the first, most direct hardware control for the computer. There are two main types of BIOS: the award BIOS and the AMI BIOS. The correct setting of the BIOS can greatly improve system performance.

Three networking specific operation setup process is as follows:

First, enter the BIOS setup

The computer just started,

When the splash screen appears, press the Delete (or del) key until you enter the BIOS (basic input/output system) settings,

The image above is the main menu for the award BIOS setup. The top row marks the type of Setup program is award Software. The item is preceded by a triangular arrowhead indicating that the item contains a submenu. There are 13 items on the main menu, respectively:

Standard CMOS Features (standard CMOS function setting)

Set date, time, soft disk size and display type.

Advanced BIOS Features (Advanced BIOS feature settings)

Set the advanced features of the system.

Advanced chipset Features (Advanced chipset feature set)

Set parameters for the chipset used by the motherboard.

Integrated peripherals (external device setting)

Make the settings menu include all peripherals settings. such as sound card, Modem, USB keyboard is open ...

Power Management Setup (source management settings)

Set the CPU, hard disk, monitor and other equipment power-saving function of the operation mode.

PNP/PCI configurations (Plug and play/PCI parameter setting)

Sets the PNP Plug and Play interface for ISA and the parameters of the PCI interface, which is only valid when your system supports PNP/PCI.

Frequency/voltage control (Frequency/voltage controls)

Set CPU frequency multiplier, set whether the automatic detection of CPU frequencies.

Load Fail-Safe Defaults (load the most secure default value)

Use this menu to load factory defaults for use as a stable system.

Load optimized Defaults (load high performance defaults)

Use this menu to load the best performance but may affect the stability of the default values.

Set Supervisor Password (set Super user password)

Use this menu to set the password for a superuser.

Set user Password (password set)

Use this menu to set the user password.

Save & Exit Setup (exit after Save)

Save the changes to the CMOS and exit the Setup program.

Exit without saving (exit not saved)

Discard the changes to the CMOS and exit the Setup program.

Second, the award BIOS setup operation method

Press the direction key "↑, ↓, ←, →" Move to the item that needs to operate

Press the ' Enter ' key to select this option

Press ESC to go back to the previous menu from the submenu or skip to the Exit menu

Press the "+" or "PU" key to increase the value or change the selection

Press the "-" or "PD" key to reduce the number or change the selection

Press the "F1" key topic Help, only in the Status Display menu and select Settings menu is valid

Press the "F5" key to restore the previous CMOS settings from the CMOS, only available on the Select Settings menu

Press the "F6" key to load the CMOS value from the failsafe default table only if the Select Settings menu is valid

Press the "F7" key to load the optimization defaults

Press the "10" key to save the changed CMOS settings and exit

How to: Select the item you want to manipulate with the arrow keys on the main menu. Then press "Enter" to enter the Item submenu, in the submenu using the arrow keys to select the items to be operated, and then press "Enter" Enter enter the subkey, and then use the arrow keys to select, after the completion of press RETURN confirmation, and finally press "F10" Key to save the changed CMOS settings and exit (or press "ESC" key to return to the previous level menu, return to the main menu, select "Save & Exit Setup" After return, enter "Y" in the pop-up confirmation window and return, that is, save the BIOS changes and exit the Setup program.

Three, Standard CMOS Features (standard CMOS function set) submenu

Select the "Standard CMOS Features" entry in the main menu with the arrow keys and enter the "Standard CMOS Features" submenu

There are 13 subkeys in the Standard CMOS Features submenu:

Date (MM:DD:YY)

Set the date on your computer in the form of "week, month, day/year". The week is defined by the BIOS and is read-only.

Time (HH:MM:SS)

Set the time in the computer, in the form of "hour/minute/sec".

IDE Primary Master (first primary IDE controller)

Set the main hard drive model. Press PgUp or PGDN to select the type of hard disk: Pressing Enter, Auto, or none. If the cursor is moved to the press Enter item, a submenu appears, displaying the current hard drive information; Auto is set automatically; None is set to no connected device.

IDE Primary Slave (first from IDE controller)

Set from the hard drive model. Set the method reference to the previous device.

IDE Secondary Master (second primary IDE controller)

Set the main optical drive model. Set the method reference to the previous device.

IDE Secondary Slave (second from IDE controller)

Set from the optical drive model. Set the method reference to the previous device.

Drive A (floppy disk drive a)

Set the primary floppy drive type. Available options are: none,360k,5.25in,1.2m,5.25 in,720k, 3.5 in,1.44m,3.5 in,2.88m,3.5 in. None is set to no connected device. 1.44m,3.5 in is a 3.5-inch floppy disk with a capacity of 1.44M (mostly for this specification)

Drive B (floppy disk drive B)

Set from the floppy disk drive type. (Very few people have two floppy drives attached)

Video (Setting the computer's display mode)

Set the video card type of the system's main display. Available options: EGA/VGA, CGA40/80, and Mono.

EGA/VGA is the enhanced display mode, EGA/VGA/SVGA/PGA color display is selected;

CGA40/80 is a row display mode;

Mono is Black-and-white monochrome mode.

Halt on (Stop boot setting)

Sets whether the system stops booting when an error is encountered during the system boot process. Available options are:

All Errors detects any errors, the system stops running, waits for processing, this is the default value;

No Errors detect any errors, the system will not stop running;

All, But keyboard detects any errors except the keyboard error, the system stops running;

All, But diskette detects any errors other than disk errors, and the system stops running;

All, But Disk/key detects any errors except disk and keyboard errors, the system stops running.

Base Memory (basic memory capacity)

This entry is used to display basic memory capacity (read only). PCs typically retain 640KB capacity as the memory usage capacity of the MS-DOS operating system.

Extended Memory (extended memory)

This entry is used to display extended memory capacity (read-only).

Total Memory (gross memory)

This entry is used to display the total memory capacity (read only).

Four, Advanced BIOS Features (Advanced BIOS feature Settings) submenu

Select the "Advanced BIOS Features" entry in the main menu with the arrow keys and enter the "Advanced BIOS Features" Item submenu below Figure 4 Figure 4

There are 20 subkeys in the Advanced BIOS Features submenu:

Virus Warning (virus alarm)

If a program attempts to modify the system boot sector or hard disk partition table after the system starts or starts, the BIOS displays a warning message on the screen with a beep beep to suspend the system. Set values are:

Disabled (disabled);

Enabled (Open).

CPU Internal cache (CPU built-in cache setting)

Sets whether the CPU built-in cache is turned on. Set to open by default. Set values are:

Disabled (disabled);

Enabled (Open).

External Cache (external cache setting)

Sets whether the external cache is turned on. Set to open by default. Set values are:

Disabled (disabled);

Enabled (Open).

CPU L2 Cache ECC Checking (CPU Level two cache parity)

Sets whether the CPU level two cache parity is turned on. Set to open by default. Set values are:

Disabled (disabled);

Enabled (Open).

Quick power on Self test (fast detection)

Setting the BIOS for fast post means simplifying the way and times of testing and shortening the time required for the post process. Whether enabled or disabled, when the post is in progress, you can still press ESC to skip the test and go directly to the boot program. The default is set to Disabled. Set values are:

Disabled (disabled);

Enabled (Open).

First boot Device (set up start disk)

Set the BIOS to first search the boot device that is loaded into the operating system. The default is set to floppy (floppy disk drive), and the installation system is recommended (HDD-0) after normal use. Set values are:

The floppy system first attempts to boot from the floppy disk drive

LS120 system first tries to boot from LS120

The HDD-0 system first tries to boot from the first hard drive

SCSI system first attempts to boot from SCSI

CDROM system first attempts to boot from CD-ROM drive

HDD-1 system first tries to boot from the second hard drive

The HDD-2 system first tries to boot from the third hard drive

HDD-3 system first tries to boot from the four hard drive

The zip system first tries to boot from the ATAPI zip

LAN system first tries to boot from network

Disabled Disable this Order

Second Boot Device (set second boot disk)

Set the BIOS after the first boot disk boot fails, the second search is loaded into the boot device of the operating system. Sets the method reference to the previous item.

Third boot Device (set second boot disk)

Set the BIOS after the second boot disk boot fails, the third search loads the boot device for the operating system. Sets the method reference to the previous item.

Boot other Device (boot for other devices)

Set this to enabled, allowing the system to attempt to boot from another device after it failed to boot from the first/second/third device. Set values are:

Disabled (disabled);

Enabled (Open).

Swap floppy Drive (swap floppy drive letter)

When you set this to Enabled, you can swap the drive characters for floppy disks A: and B:.

Boot up floppy seek (detect floppy drive on boot)

When this key is set to Enabled, the BIOS detects floppy disk A: before booting the system. Depending on the boot device installed, the optional devices that appear in the First/second/third boot Device option are different. For example, if your system does not have a floppy drive installed, the floppy drive settings will not appear in the Boot order menu. Set values are:

Disabled (disabled);

Enabled (Open).

Boot Up NumLock status (initial numeric keypad lock state)

This is used to set the number or orientation of the keypad on the right of the keyboard after the system is started. When on, Num Lock is turned on when the system is started and the keypad number key is valid. When set to OFF, NUM LOCK is turned off after the system starts and the keypad key is valid. The setting value is: On,off.

Gate A20 option (selection of gate A20)

This is used to set how the system accesses more than 1MB of memory (extended memory). A20 refers to the 64KB of the front of the extended memory. When the default fast is selected, GATEA20 is specifically controlled by Port 92 or chipset, which can make the system faster. When set to normal, A20 is controlled by the keyboard controller or chipset hardware.

Typematic Rate Setting (type rate setting)

This entry is used to control the input rate of characters. Settings include typematic Rate (character input rate) and typematic Delay (character input delay). The default value is disabled (disabled).

Typematic Rate (chars/sec) (character input rate, character/sec)

After the Typematic Rate setting option is disabled, the entry is invalid; After the Typematic Rate setting option is enabled, you can set the rate of keyboard acceleration (characters/sec). The set values are: 6, 8, 10, 12, 15, 20, 24, 30.

Typematic Delay (Msec) (character input delay, MS)

This entry is not valid when the Typematic Rate setting option is disabled, which allows you to select the first time the keyboard presses down and accelerates the delay between starts. The set values are: 250,500,750 and 1000.

Security option (Secure options)

This entry specifies the type of protection used for the BIOS password. Set a value of System to enter a password whether it is on or into the CMOS setup, setting the value of Setup when the password is not required to enter the CMOS setup.

OS Select for DRAM > 64MB (set OS2 use memory capacity) default value is Non-os2

Report no FDD for Win 95 (set in WIN 95 reported there is no FDD) default value is no

Video BIOS Shadow (copy BIOS to image memory)

The BIOS is copied to the image memory to maintain system performance in the best possible state. The default values are the enabled values:

Disabled (disabled);

Enabled (Open).

V. Advanced chipset Features (Advanced chipset feature Settings) submenu

Select the "Advanced chipset Features" entry in the main menu with the arrow keys and enter the Advanced chipset Features Item submenu as shown in Figure 5, Figure 5

There are 9 subkeys in the Advanced BIOS Features submenu:

SDRAM CAs Latency time (CAS delay period)

SDRAM Cycle Time Tras/trc ()

SDRAM Ras-to-cas Delay (the number of clock cycles between the CAS pulse signal and the RAS pulse signal is set)

This entry allows you to set the number of clock cycles that are delayed from the CAS pulse signal to the RAS pulse signal when writing to DRAM, read out, or refresh. Faster speeds can improve system performance, while relatively slow speeds can provide more stable system performance. This entry is only valid if you have sync dram installed in your system. Setting values are: 3 and 2 (clocks).

SDRAM RAS Precharge Time (RAS pre-charge)

This is used to control the number of clock cycles of the RAS (Row address strobe) pre-charging process. If there is not enough time for the RAS to accumulate power before the DRAM is refreshed, the refresh process may not complete and the DRAM will not hold the data. This entry is only valid if you have synchronized DRAM installed in your system.

System BIOS cacheable (capacity of systems cache BIOS)

Vido BIOS cacheable (cache capacity of the video card bios)

CPU Lateny Time (CPU latency set)

This item controls whether the CPU has deferred execution after accepting the command.

Delayed Transaction (delayed transmission)

The chipset is built with a 32-bit write cache that supports deferred clock cycles, so data interchange on the ISA bus can be cached, while the PCI bus can perform other data processing while the ISA bus processes data. Set to Enabled to be compatible with PCI 2.1 specifications. Set values are: enabled,disabled.

On-chip vido Windows Size (video memory capacity)

The increase in the graphics cache improves the quality of the picture, but at the same time reduces the amount of available physical memory for the price.

VI. Integrated peripherals (External device Settings) submenu

Select the "Integrated Peripherals" entry in the main menu with the arrow keys and enter the "Integrated Peripherals" submenu below Figure 6 Figure 6

There are 27 subkeys in the Integrated Peripherals submenu:

On-chip Primary PCI IDE (onboard first PCI slot settings)

The consolidated perimeter controller includes an IDE interface that supports two IDE channels. Select Enabled to activate each channel independently. The default values are the enabled values:

Disabled (disabled);

Enabled (Open).

On-chip Primary/secondary PCI IDE (onboard second PCI slot settings)

The default values are the enabled values:

Disabled (disabled);

Enabled (Open).

IDE Primary Master PIO (IDE first Master PIO mode setting)

The Four IDE PIO (programmable input/output) entries allow you to set PIO mode (0-4) for each IDE device supported by the onboard IDE. Patterns 0 through 4 provide incremental performance. In Auto mode, the system automatically determines the best mode of work for each device. The setting values are: Auto,mode 0,mode 1,mode 2,mode 3,mode 4.

IDE Primary Slave PIO (IDE first set from PIO mode)

Set method Ibid.

IDE Secondary Master PIO (IDE second main PIO mode setting)

Set method Ibid.

IDE Secondary Slave PIO (IDE II set from PIO mode)

Set method Ibid.

IDE Primary Master UDMA (IDE first primary UDMA mode setting)

Ultra dma/33/66/100 can only be used when your IDE hard disk supports this feature, and the operating environment includes a DMA driver (Windows OSR2 or a Third-party IDE bus control driver). If your hard drive and your system software support Ultra Dma/33,ultra DMA/66 or Ultra dma/100, select Auto to make BIOS support valid. Set values are: Auto (auto), Disabled (disabled).

IDE Primary Slave UDMA (IDE first set from UDMA mode)

Set method Ibid.

IDE Secondary Master UDMA (IDE second main UDMA mode setting)

Set method Ibid.

IDE Secondary Slave UDMA (IDE II set from UDMA mode)

Set method Ibid.

USB Controller (USB controller settings)

This item is used to control onboard USB controllers. Set values are: enabled,disabled.

USB Keyboard Support (USB keyboard control support)

If you are using a USB keyboard, such as DOS and SCO Unix, under an operating system that does not support USB or do not have a USB drive, you need to set this to Enabled.

Init Display First (initial display setting on boot)

AC97 Audio (set whether to use the chipset with built-in AC97 sound)

This setting value applies to the AC97 sound effects that you use with your own. If you need to use a different sound card, you need to set this value to "Disabled". Set Value has

Disabled (disabled);

Enabled (Open).

IDE HDD block mode (IDE hard disk blocks modes)

Block mode is also called Block Exchange, Degree command, or multiple sector read/write. If your IDE hard disk supports block mode (most new hard drive support), select Enabled to automatically detect the number of block reads/writes per sector that is best supported by the hard disk. Set values are:

Disabled (disabled);

Enabled (Open).

Power on Function (set boot mode)

When this is set to "keyboard", the next "KB Power on Password" is activated, and when this is set to Hodkey (hotkey), the next hot key power is activated. You can choose the following way to boot:

button only (using the power-on button only)

Mouse Left (mouse button)

Mouse Right (left mouse button)

PassWord (password)

Hodkey (Hot Key)

Keyboard (keyboard)

KB Power on Password (set keyboard to boot)

This item is activated when the "Power on Function" setting is set to "keyboard (keyboard)". The default value is: Enter (enter the password directly).

Hot Key Power On (setting hotkey startup)

This item is activated when the "Power on Function" is set to "Hodkey (Hot Key)." The default value is: Ctrl-f1 (using Ctrl + F1 key).

Onboard FDC Controller (built-in floppy drive controller)

Sets whether to use the built-in floppy drive controller, the default is: Enabled (used). Set values are:

Disabled (disabled);

Enabled (Open).

Onboard serial port 1/2 (built-in serial port settings)

This item sets the basic I/O port address and interrupt request number for the motherboard serial port 1 (COM 1) and serial port 2 (COM 2). Select Auto to allow award to automatically determine the appropriate basic I/O port address. Set values are: Auto (auto), 3f8/irq4,2f8/irq3,3e8/com4,2e8/com3,disabled (disabled).

UART Mode Select (UART model selection)

Onboard Parallel port (parallel ports settings)

This item provides the basic I/O port address for the onboard parallel interface. Select Auto to allow the BIOS to automatically determine the appropriate basic I/O port address. Set values are: Auto (auto), 378/irq7,278/irq5,3bc/irq7,disabled (disabled).

Parallel Port mode (parallel port pattern setting)

This option allows you to select the working mode of the parallel port. Set values are: Spp,epp,ecp,ecp+epp,normal.

SPP: Standard parallel port

EPP: Enhanced Parallel port

ECP: Extended Performance ports

ECP + EPP: Extended performance ports + enhanced parallel ports

Normal: OK

Game Port address (onboard game ports)

This entry is used to set the basic I/O port address for the onboard game port. Set values are: Disabled (disabled), 201,209.

MIDI port address (onboard MIDI ports)

This entry is used to set the basic I/O port address for the onboard MIDI port. Set values are: Disabled (disabled), 330,300,290.

MIDI Port IRQ (MIDI ports IRQ selection)

This term sets the interrupt request number for the onboard MIDI port. The set values are: 5, 10.

Seven, Power Management Setup (source management Settings) submenu

Select the "Power Management Setup" key in the main menu and enter the "Advanced chipset Features" sub-menu as shown in Figure 7, Figure 7

There are 16 subkeys in the Power Management Setup Item submenu:

IPCA function (setting whether to use ACPI functionality)

This entry is used to activate the ACPI (Advanced Configuration and Power management Interface) feature. If your operating system supports Acpi-aware, such as Windows 98se/2000/me, select Enabled. Set values are:

Disabled (disabled);

Enabled (Open).

ACPI Suspend Type (ACPI pending types)

This option sets the power-saving mode for ACPI features. The options are: S1 (POS) Hibernate mode is a low-power state in which no system context is lost and the hardware (CPU or chipset) maintains all system contexts. S3 (STR) Hibernation mode is a low-power state in which power is supplied only to the main parts, such as main memory and the wake-up system device, and the system context is saved in the main memory. Once a "wake up" event occurs. The information stored in memory is used to restore the system to its previous state.

Power Management (Supply management mode)

This item is used to select the type of power saving. The default value is: User Define (Custom), set values are:

User Define (custom);

Min Saving (Stop 1 hours to enter the power-saving function mode);

Max Saving (disable 10 seconds to enter the power-saving function mode).

Video off method (visual shutdown)

Sets how video is closed. The default value is: DPMS (monitor power management). Set values are:

V/hsync+blank (Changes the screen to blank and stops vertical and horizontal scans);

Blank screen (blank);

DPMS (monitor power management for BIOS control graphics cards that support DPMS-saving functions).

The default value of the video off in Suspend (turning off the videos in suspend) is yes

Suspend type (pending types) defaults to Yes

Modem use IRQ (Modem interrupt value) defaults to 3

Suspend mode (suspend) defaults to: Disabled (Disabled).

When the PC is not used for how long, it enters the suspend power state, the CPU work frequency to 0MHz, and notifies the relevant province by the equipment in order to enter the provincial power state.

HDD Power down (hard drive off mode) defaults to Disabled (disabled);

Set the hard drive power off mode timer and when the system stops reading or writing the hard drive, the timer starts to calculate and the system shuts down the hard drive power when it is obsolete. Once you have read and write the hard drive command to execute, the system will start running again.

Soft-off by PWR-BTTN (soft shutdown mode) Default: Instant-off (immediate shutdown)

How to turn off the computer when you click "Shut down Computer" or run the shutdown command in the system. Set values are:

Instant-off (close immediately);

Delay 4 sec (delayed 4 seconds after shutdown).

The default value of Wake-up by PCI card (setting whether to wake with PCI) is disabled (disabled).

The Power Onby ring (set to use modem wake-up) defaults to Enabled (adopted).

The default value of Resune by Alarm (set to use a timed boot) is disabled (disabled).

Primary IDE 0 (sets whether to cancel the current PC and the power state of the IDE if the primary IDE 0 has access requirements) The default is disabled (disabled).

Primary IDE 1 (sets whether to cancel the current PC and the power state of the IDE if the primary IDE 1 has access requirements) The default is disabled (disabled).

Secondary IDE 0 (set to cancel the current PC and the power state of the IDE if you have access requirements from IDE 0) The default is disabled (disabled).

Secondary IDE 1 (set to cancel the current PC and the power state of the IDE if you have access requirements from IDE 1) The default is disabled (disabled).

Fdd,com,lpt Port (set when the floppy drive, serial port, parallel port has access requirements, whether to cancel the current PC and the IDE's power state) The default value is disabled (disabled).

Viii. PNP/PCI configurations (Plug and play/PCI parameter setting) submenu

Select the "PNP/PCI configurations" entry in the main menu with the arrow keys and enter the "PNP/PCI Configurations" submenu below Figure 8 Figure 8

There are 4 subkeys in the PNP/PCI Configurations submenu:

Reset Configuration data (reset profile)

You should usually set this to disabled. If you install a new add-in card, the system will be reconfigured after a serious conflict, resulting in the inability to enter the operating system, this is set to Enabled, you can after exiting Setup, reset extended System Configuration Data (ESCD, Extended system Configuration Data). Set values are:

Disabled (disabled);

Enabled (Open).

Resource controlled by (resource control)

Plug and Play BIOS (Plug and Play BIOS) for award can automatically configure all boot devices and plug-and-go-compatible devices. However, this feature is only available when you are using a Plug and Play operating system, such as Windows 95/98. If you set this to Manual (manual), you can go to each submenu of this item (each submenu begins with "") and manually select a specific resource. Set values are: Auto (ESCD), Manual.

IRQ Resources (IRQ Resource)

This entry is only valid if the resources controlled by is set to manual. by Pressing the key, you will enter the submenu. IRQ Resources lists IRQ 3/4/5/7/9/10/11/12/14/15, which allows the user to set each IRQ based on the type of device using the IRQ. Set values are:

PCI Device (Plug & Play compatible device for PCI bus architecture)

Reserved IRQ (to be reserved for subsequent requests)

PCI/VGA Palette Snoop (PCI/VGA palette configuration)

When set to Enabled, multiple VGA devices working on different buses can process data from CPUs on different palettes of different video devices. The fifth digit in the command buffer in the PCI device is the VGA palette detection bit (0 is disabled). For example, if your computer has two VGA devices (one is PCI and one ISA), set the following: If any of the SA adapter cards installed in the system require VGA palette detection, this must be set to Enabled.

Ix. frequency/voltage Control (frequency/voltage Controlled) submenu

Use the arrow keys in the main menu to select the "Frequency/voltage control" entry and then enter the "Frequency/voltage Control" submenu as follows Figure 9

Figure 9 There are 4 subkeys in the submenu of the Frequency/voltage control item:

Auto Detect DIMM/PCI Clk (automatic detection of DIMM/PCI clock frequency)

When set to Enabled, the system automatically detects the installed DIMM memory strips or PCI cards, and then provides the clock to it, and the system shields off the idle DIMM slots and the clock signals in the PCI slots to reduce electromagnetic interference (EMI). Set values are:

Disabled (disabled);

Enabled (Open).

Spread Spectrum (Frequency exhibition)

When the clock oscillator on the motherboard works, the extreme value of the pulse (spike) will produce EMI (electromagnetic interference). The frequency range setting function can reduce the electromagnetic interference generated by the pulse generator, so the cusp summit of the pulse wave decays to a more smooth curve. If you are not experiencing EMI problems, set this to disabled, which optimizes the performance and stability of the system. However, if you are disturbed by the electromagnetic interference problem, please set this to Enabled, so as to reduce electromagnetic interference. Note that if you use overclocking, you must disable this item. Because even a tiny peak drift (jitter) can introduce a momentary burst of clock speed, which can cause your overclocking processor to lock up. The options are: enabled,+/-0.25%,-0.5%,+/-0.5%,+/-0.38%.

Host CPU/DIMM/PCI Clock (CPU main frequency DIMM memory/pci clock frequency)

This option specifies the combination of the front-end system bus frequency of the CPU, the memory stripe clock frequency, and the PCI bus frequency. It gives the user a way to overclocking the processor. If this key is set to the DEFAULT,CPU main bus, the clock frequency of the memory and PCI buses will be set to the default value. Set values are:

Disabled (disabled);

Enabled (Open).

CPU Clock Ratio (CPU frequency multiplier setting)

For an unlocked CPU, you may want to set your CPU multiplier in this key to display normally, but if you have the CPU on hand that is locked-frequency CPU, then you do not need to do CPU frequency multiplier settings, the item can be displayed normally.