BIOS types
BIOS types
Hey there! There are several BIOS types, each serving different purposes. Some are designed for compatibility, while others focus on performance or security. The most functional usually depends on your needs—whether it's basic functionality, speed, or advanced features. Let me know if you want more details!
Award winners include Pheonix, IBM, American Megatrends, Dell, and MoBo Skinned (UEFI).
The widely used name is firmware, not BIOS. BIOS is actually a kind of firmware. BIOS, or Basic Input Output System, is an older form of firmware with minimal capabilities—just a keyboard for input, a basic display featuring mainly blue, white, and red tones, and it can only start from drives under 2TB. It sets up and recognizes each hardware component during boot, then passes this information to Windows, which must reconfigure everything from scratch. BIOS relies on the Master Boot Record (MBR) on hard drives, which contains all drive data in the first megabyte. When BIOS loads an operating system, it reads the boot sector on the MBR to begin loading the OS, but it cannot confirm any modifications have been made. The MBR supports up to four partitions per disk and a maximum drive size of 2TB. UEFI, or Unified Extensible Firmware Interface, is a newer firmware standard that emerged around 2012, required for Windows 8 installations. UEFI offers greater features: it accepts mouse input, provides improved display output for better setup tools, and can read/write to FAT file systems. It also introduces the GUID Partition Table (GPT), which allows up to 128 partitions per disk and supports larger drives. GPT distributes partition data across the entire disk, reducing the risk of corruption. When UEFI starts, it initializes all hardware simultaneously and shares that information with the operating system. Regarding booting without a boot sector, UEFI uses an UEFI System Partition (ESP)—a small FAT32-formatted partition that holds the OS boot files. The boot manager resides there, typically named boot<pctype>.efi (e.g., bootx64.efi for 64-bit systems). This setup enables Secure Boot, which checks the signature of the boot file against a trusted source. If the file is untrusted or missing a signature, UEFI can prevent the system from booting.
Some firmware allows remote control through an app on your PC, while others remain locked until the Windows bootloader loads.
I aim to understand what you're trying to achieve. I believe BIOS and UEFI are essentially different interfaces, with their appearance and settings adapting to the motherboard and vendor. My current understanding is limited to certain overclocking tools modifying BIOS/UEFI configurations on Windows.
You've managed CPU overclocking and fan adjustments in Windows for years using tools from the motherboard manufacturer or other sources. Most features remain restricted to the BIOS only.