Perform BIOS Settings of PC

When you power on a newly assembled or existing computer, the very first program that runs is the BIOS. Whether you’re setting up a new PC or troubleshooting hardware, learning how to perform BIOS settings of PC is an essential computer skill.

This post will guide you through the basics of BIOS, its important settings, and how to configure it safely for optimal performance.

🧠 What is BIOS?

BIOS stands for Basic Input/Output System.
It is a small firmware stored on a chip on the motherboard. BIOS initializes hardware components and loads the operating system (OS) into memory when the computer starts.

In simple terms, BIOS is the bridge between your computer’s hardware and software.

🔍 Functions of BIOS

1. Performs POST (Power-On Self-Test) – Checks hardware components like RAM, CPU, and drives during startup.
2. Loads Bootloader/OS – Finds and loads the operating system from a storage drive.
3. Provides System Configuration Interface – Allows users to set up hardware, clock, boot order, etc.
4. Manages Power and Performance – Handles fan control, CPU voltage, and overclocking settings.

🖥️ How to Enter BIOS Setup

You can access the BIOS during the system’s startup phase.

Steps to Enter BIOS:

1. Turn on or restart your computer.
2. When the manufacturer’s logo appears, press the BIOS key repeatedly.
3. Common keys include:
   • DEL or F2 – Most desktops/laptops
   • F10 – HP
   • ESC / F1 / F12 – Other brands

Once inside, you’ll see the BIOS Setup Utility screen with various menus and options.

⚙️ Important BIOS Settings to Configure

🧩 1. Date and Time

Set the system’s correct date and time.
This ensures proper file timestamps and system log accuracy.

💿 2. Boot Order / Boot Priority

This determines which device the BIOS tries to boot from first.
Example Boot Order:

1. USB Drive (for OS installation)
2. Hard Disk / SSD
3. CD/DVD Drive

👉 To install Windows or Linux, set the USB drive as the first boot device.

🔋 3. Load Default or Optimized Settings

If the system behaves abnormally, select “Load Optimized Defaults” or “Load Setup Defaults” to restore safe configuration values.

🧠 4. CPU Configuration

This section allows enabling/disabling of processor features:

• Intel Virtualization (VT-x)
• Hyper-Threading
• C-States
• Overclocking controls

⚠️ Tip: Modify CPU settings only if you know what you’re doing — incorrect changes can cause instability.

🧮 5. Memory (RAM) Settings

Check your RAM’s speed and channels.
You can enable XMP (Extreme Memory Profile) to run RAM at its rated speed for better performance.

💾 6. Storage Configuration

Choose between storage modes:

• IDE – Older systems
• AHCI – Recommended for modern SSDs and HDDs
• RAID – For multiple drive configurations

👉 Always set to AHCI mode for better performance and compatibility.

🧩 7. SATA / NVMe Device Detection

Make sure all connected drives (HDD, SSD, NVMe) are detected.
If not, recheck cables or enable the relevant port in BIOS.

🔐 8. Security Settings

Protect your system by setting passwords:

• Administrator Password – To access BIOS setup.
• User Password – To boot the system.

You can also enable Secure Boot to prevent unauthorized OS loading.

🌀 9. Hardware Monitoring

This section displays system temperature, voltage, and fan speeds.
You can:

• Set fan curves for cooling performance.
• Monitor CPU temperature to prevent overheating.

💡 10. Exit and Save Changes

After adjusting settings:

• Select “Save & Exit Setup” to apply changes.
• Or choose “Discard Changes” if you want to cancel modifications.

🧰 Common BIOS Troubleshooting Tips

⚡ Importance of BIOS Configuration

Proper BIOS configuration ensures:

• Stable system startup
• Optimal hardware performance
• Secure and reliable operation
• Compatibility with modern operating systems

🧭 UEFI vs Traditional BIOS

Modern PCs use UEFI (Unified Extensible Firmware Interface) — a more advanced and graphical version of BIOS that supports:

• Larger hard drives (over 2 TB)
• Faster boot times
• Mouse navigation
• Secure Boot feature

UEFI still performs the same role but with better features and security.

🏁 Conclusion

Performing BIOS settings is one of the most essential steps after assembling or upgrading a PC. It ensures that all components communicate correctly, the system boots properly, and the computer runs at peak performance.

Take time to understand your BIOS layout — every manufacturer (ASUS, MSI, Gigabyte, HP, Dell) has slightly different menus, but the core options remain the same. Once you master BIOS settings, you gain full control over your computer’s hardware behavior!

❓ FAQs on BIOS Settings

Q1. What happens if I change the wrong BIOS setting?
Incorrect settings may prevent the system from booting. You can reset BIOS using the CMOS battery or Load Defaults option.

Q2. How do I reset BIOS to default?
Enter BIOS → Select Load Optimized Defaults → Save & Exit.

Q3. Can BIOS be updated?
Yes, you can update (flash) the BIOS from a USB drive, but it should be done carefully to avoid system corruption.

Q4. What is Secure Boot?
Secure Boot prevents unauthorized operating systems from running, protecting against malware during boot.

Q5. What key opens BIOS on startup?
Usually DEL, F2, or F10, depending on your motherboard or laptop brand.