What are the Differences between UEFI and BIOS

UEFI vs BIOS What's the Difference
UEFI vs BIOS What’s the Difference

If you’ve ever wondered about the inner workings of your computer or encountered terms like UEFI and BIOS when fiddling with your PC settings, you’re not alone. UEFI and BIOS are both essential components of your computer’s startup process, but they serve distinct roles. In this article, we’ll break down “UEFI vs BIOS: Get to Know the Difference”. Making it easier for you to understand these crucial aspects of your computer’s operation. Please read How to update the BIOS on your Dell system, Find BIOS Serial Number and System Information on Windows 11.

BIOS: The Classic Start

BIOS Setup Utility
System BIOS Setup Utility

BIOS (Basic Input/Output System) has been a staple of computer technology for decades. It’s essentially a firmware interface that helps your computer communicate with its hardware during startup. Imagine BIOS as the conductor of a symphony, coordinating all the instruments (your hardware components) to play in harmony. Read How to Fix for security vulnerabilities in the BIOS firmware for some Intel Processors.

How Does BIOS Work?

When you turn on your computer, the BIOS kicks into action. It performs a series of hardware checks and configurations known as POST (Power-On Self-Test). This process ensures that all your hardware components, like the CPU, RAM, and storage devices, are functioning correctly. Once the checks are done, BIOS locates the boot device, typically your hard drive or SSD, and hands over control to the operating system. Read How to Enable Virtualization in BIOS: Determine if the Intel VT-x or AMD-V Virtualization Technology is enabled in BIOS.

Here are some key aspects of BIOS:

Please see Modern Standby: PC is automatically encrypted, UEFI, TPM, BitLocker FAQs: Disable Sleep Mode, and Disable modern standby on Windows 10 and 11.

Legacy Technology: BIOS has been around for a long time and follows an older standard. It relies on the Master Boot Record (MBR) partitioning scheme, which has limitations when it comes to handling large storage drives and modern hardware. Read Run MBR and GPT conversion with the best GPT converter.

Text-Based Interface: BIOS typically uses a text-based interface that you might have seen when accessing your computer’s startup settings. It’s often black and white, with keyboard navigation.

Limited Functionality: BIOS has basic functionality and isn’t capable of handling some advanced features like secure boot, which is crucial for protecting against malware during startup.

UEFI: The Modern Makeover

UEFI Boot menu
System UEFI Boot menu

UEFI (Unified Extensible Firmware Interface) is a more recent development in the world of computer firmware. It was introduced to address the limitations of BIOS and to provide a more modern and versatile approach to system initialization.

How Does UEFI Work?

UEFI boots your computer in a more flexible and graphical manner. It supports larger hard drives, faster boot times, and modern hardware standards like 64-bit processing. UEFI can even connect to the internet to download updates and drivers for your hardware. It’s like BIOS with a high-tech makeover. Read How to Create a Windows 10 or 11 bootable USB with UEFI support.

Here’s what you need to know about UEFI: You might be interested in these: How to enable Secure Boot on PC to install Windows 11, how to Prevent Microsoft Edge from sending your Search data to Microsoft, and how to Disable and Enable Windows Startup Sound in Windows 11.

Newer Technology: UEFI is a newer and more flexible system compared to BIOS. It supports the GUID Partition Table (GPT), which allows for larger storage drives and improved data integrity.

Graphical Interface: UEFI typically features a graphical user interface (GUI) that’s more user-friendly and visually appealing. It allows for mouse navigation, making it easier to configure settings.

Advanced Features: UEFI offers a broader range of features, including secure boot, which verifies the authenticity of firmware and operating system components during startup, enhancing security. UEFI can also support larger hard drives and faster boot times.

Key Differences

  1. Boot Methods: BIOS relies on the MBR boot method, while UEFI uses the GPT method. GPT is more versatile and suitable for modern storage devices.
  2. Interface: BIOS uses a text-based interface, while UEFI provides a graphical interface for user interaction.
  3. Security: UEFI offers enhanced security features like secure boot, which BIOS lacks.
  4. Legacy vs. Modern: BIOS is considered legacy technology, while UEFI represents the modern standard in firmware interfaces.

How to Check Your PC Firmware

To perform this check, follow these simple steps:

Begin by opening the Start Menu on your Windows computer. Once the Start Menu is open, type “System Information” in the search bar and then press “Enter” on your keyboard or click on the “System Information” app that appears in the search results.

System information
Open System information

Look for a category called “BIOS Mode” or “Firmware Mode” in the left-hand menu, you’ll find information indicating whether your computer is using BIOS or UEFI. It will typically state “Legacy” for BIOS or “UEFI” for UEFI.

BIOS mode
Check the BIOS mode


In the grand scheme of your computer’s operation, UEFI and BIOS play vital roles in ensuring a successful startup process. While BIOS has served admirably for many years, UEFI represents a necessary evolution to accommodate modern hardware and security needs. Understanding the differences between these two firmware interfaces can empower you to make informed decisions when configuring your computer and troubleshooting startup issues. Ultimately, UEFI is the future, and as technology advances, it’s likely to become the standard in all computing devices.

FAQ on the differences between BIOS and UEFI

FAQ 1: Can I switch from BIOS to UEFI on my existing computer?

Switching from BIOS to UEFI isn’t a straightforward process and may not be possible on older hardware. UEFI requires a GPT (GUID Partition Table) partition scheme, while BIOS uses MBR (Master Boot Record). To make the switch, you’d typically need to reinstall Windows or perform a complex conversion process. If you’re unsure, it’s best to consult with a professional or refer to your computer’s manufacturer for guidance.

FAQ 2: Does using UEFI offer any advantages over BIOS for everyday computing tasks?

While both BIOS and UEFI serve the fundamental purpose of booting your computer, UEFI offers several advantages for modern computing. It provides faster boot times, a more user-friendly interface, enhanced hardware support, and improved security features like secure boot. If your computer supports UEFI, it’s generally recommended for a more efficient and secure computing experience.

FAQ 3: How Can I access the UEFI or BIOS settings on my computer?

The method varies depending on your computer’s manufacturer and model. Typically, you need to press a specific key (e.g., F2, Del, Esc, or F12) during the initial boot-up process before the operating system loads.

Consult your computer’s documentation or perform an online search with your computer’s make and model to find the exact key and steps to access these settings. Once inside, you can configure hardware settings, boot options, and more.

I hope you found this article useful on “UEFI vs BIOS: Get to Know the Difference”. Please let me know in the comment section if you have any questions.

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