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DIFFERENCE BETWEEN LEGACY AND UEFI BIOS

 

LEGACY BIOS

LEGACY BIOS, OR BASIC INPUT/OUTPUT SYSTEM, IS A FIRMWARE INTERFACE THAT HAS BEEN USED IN PERSONAL COMPUTERS SINCE THE 1980S.

IT IS RESPONSIBLE FOR INITIALIZING THE HARDWARE AND LOADING THE OPERATING SYSTEM. LEGACY BIOS IS A 16-BIT SYSTEM,

WHICH MEANS THAT IT IS LIMITED IN ITS CAPABILITIES. FOR EXAMPLE, IT CAN ONLY SUPPORT HARD DRIVES UP TO 2.2 TERABYTES IN SIZE.

___________

UEFI

UEFI, OR UNIFIED EXTENSIBLE FIRMWARE INTERFACE, IS A NEWER FIRMWARE INTERFACE THAT WAS INTRODUCED IN 2005. IT IS DESIGNED TO REPLACE LEGACY BIOS AND OFFERS A NUMBER OF ADVANTAGES, INCLUDING:

FASTER BOOT TIMES

SUPPORT FOR LARGER HARD DRIVES (UP TO 9 ZETTABYTES)

A GRAPHICAL USER INTERFACE

SECURE BOOT SUPPORT

SUPPORT FOR NETWORK BOOTING

UEFI IS A 32-BIT OR 64-BIT SYSTEM, WHICH GIVES IT MORE FLEXIBILITY THAN LEGACY BIOS. IT ALSO SUPPORTS A WIDER RANGE OF HARDWARE, INCLUDING 64-BIT PROCESSORS AND UEFI-COMPATIBLE OPERATING SYSTEMS.

____________

DIFFERENCE BETWEEN THEM

  • Feature

  • Legacy BIOS

  • UEFI

  • Architecture

  • 16-bit

  • 32-bit or 64-bit

  • User interface

  • Text-based

  • Graphical

  • Hard drive support

  • Up to 2.2 terabytes

  • Up to 9 zettabytes

  • Boot times

  • Slower

  • Faster

  • Secure boot

  • No

  • Yes

  • Network boot

  • Limited

  • Full support

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