The BIOS is the firmware responsible for booting up your PC. BIOS configuration is a basic input/output system.
Before the operating system is loaded and takes over the computer, the BIOS configuration checks and initializes all your hardware and bootstraps the boot process.
BIOS is an integral part of your computer, BIOS is a program that is made accessible to the microprocessor on an erasable programmable read-only memory (EPROM) chip. When you turn on your computer, the microprocessor passes control to the BIOS program, which is always located at the same place on EPROM.
The BIOS interface allows you to tweak your machine’s hardware outside the operating system. Over clocker’s spend a lot of time in the BIOS adjusting voltage and CPU frequency multipliers. Even if you’re not an over clocker, significant system fixes often require BIOS access and UEFI
Common BIOS Configuration Explained
To enter the BIOS configuration, wait until your computer beeps during boot, then press the key required to enter the BIOS configuration or Setup, typically displayed on the BIOS boot screen (e.g. Delete, F2, F10,Esc+F1 etc).
If you have an unlocked processor, this configuration can change the frequency of the CPU and adjust the voltage received by the CPU. The balance between heat, voltage, frequency, and stability often requires frequent visits to the BIOS to coax the most power out of a given chip.
By default, the BIOS boot order configuration is likely disk drive, then hard drives. If your PC only has one hard drive, you likely don’t need to touch this setting. If you’re dual-booting or need to another boot from a USB stick CD drive , you’ll need to manually select the device in the BIOS’ boot order section.
Most operating systems now fully support USB 3.0 that was not always the case. As such, there are a number of settings on most newer motherboards for managing USB 3.0 settings. Here, you can also adjust support for legacy BIOS USB support if older devices require it. Individual chips handling USB ports and other peripheral connection ports can also be enabled or disabled in these settings.
SATA connects hard drives, solid state drives, and disk drives to your motherboard. By default, SATA can automatically detect what kind of device is connected to each SATA port and optimize the connection based on that information. If you can manually tweak port assignments and management systems to ensure the best results.
If you have multiple GPUs on your machine, the display configuration can stand for important action; it means the correct GPU configuration. If you have a graphics card mounted or insert in a PCI slot, you’ll typically want the BIOS to use that graphics card for the boot process. Options typically include “IGFX” for on-processor internal graphics and “PCI” for PCI-mounted graphics cards.
The power states of your computer are also important configuration. Power states of your computer handled by the motherboard, and that decides which devices get power and how much they get. Things like hibernation and suspension are handled in the power management settings, providing specific options for what happens under different circumstances. This is most important in laptops, where battery power means that detailed power management settings can be necessary.
These options adjust the behavior of the computer’s power button. Options normally include instant shut down, delayed shut down, and sleep modes.
If you want your Computer to wake from sleep when it receives a packet from the LAN (Local area network). Wake-on-LAN settings allow for that. On unsupported operating systems, this can also cause boot loops, so it’s often best to turn it off unless you know you need the functionality.
These options may or may not appear in your BIOS, depending on your system configuration, but they’re frequently present on higher-end consumer motherboards.
If your PC has system fans with adjustable speeds, the motherboard may allow you to adjust the fan’s speed. Depending on the sophistication of the system, you may tweak fan curves in a graphical interface or select text-based presets.
Each BIOS manufacturer has its own configuration and also Each BIOS manufacturer has its own diagnostic codes to identify specific errors. You need to consult the documentation.
Many motherboard manufacturers will use code similar to the original IBM POST codes,. If you get a single beep, all is good. In some cases, these beeps are also accompanied by a diagnostic code; you also look in the BIOS documentation.
IBM POST Beep Codes &Description
One short beep
Normal POST – System is Okay
Two short beeps
POST error – Memory card not work
Power supply or system board problem
Power supply, system board or keyboard problem
Repeating short beeps
Power supply or system board problem
One long and one short beeps
System board problem
One long an two short beeps
Display adapter problem
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