Hardware

BIOS vs. UEFI

Are you old school, or new school?

You expect to see if you boot into your operating system when you turn on your device. This OS can be Windows, Mac OS, Linux etc and if you have a machine that doesn’t have any operating system, you can weigh up a lot BIOS vs. UEFI.

It involves some low-level software called BIOS or UEFI in order to connect to your device to make sure that it all works properly and ready for the operating system to load. This programme does stuff such as running a Power On Self Test (POST) to check the hardware and then run some form of bootloader to load your operating system to your hard disc.

It is also responsible for storing items like device time stored in the CMOS battery and preserving the boot order of the drives. It also provides simple control of the hardware with low-level drivers that are used by the computer. Stuff like RAM capacity and hard drive settings can be tested.

The BIOS or the newer UEFI (Unified Extendable Firmware Interface) will both be incorporated into all motherboards, which both act as the user interface between an operating system and the platform firmware. If you have a newer computer, you can have a UEFI because the use of a BIOS no longer works, so you will be able to access the BIOS, instead of the UEFI, to check the settings and adjust the device settings if you are using an older computer. The look of a BIOS screen (top) as well as the UEFI screen (bottom) with a much more modern look, is very different, as you can see below. In addition, most UEFI interfaces allow you to use the mouse with the old BIOS displays (using the arrow keys and Enter button on the keyboard).

Compared to modern UEFI schemes, the BIOS has some limitations

  • It should be stored in the motherboard on a non volatile ROM chip.
  • You can boot only from 2.1 TB or less drives.
  • The processor must work in 16 bit mode.
  • The executable room is just 1024KB.
  • It is lent to try to start many hardware devices.
  • UEFI profits greatly from the BIOS.

It uses the MBR and bigger hard drive capacity GPT partition scheme

  • Stable Boot Supports.
  • It is available in 32 or 64-bit mode.
  • You can save it on your Mainboard, hard drive or even a network share in flash memory.
  • Can be booted faster by the computer.

The key thing of BIOS vs. UEFI you’ll see for those people who are not great hardware fan, is that the UEFI is much easier to use than one with a BIOS and you will be able to use your mouse to click through the settings if you are a grafical user interface.

Check for a message on the monitor during initialization to specify “x” for installation or setup, etc. It may be a delete or escape key, or even a F key such as F2. You can find out how to enter these settings in your motherboard manual or you may check up online on the motherboard to see if you can.

You can search and view all specific settings once you’re in there. Unless you know what you are doing and if there is a real need to do so, I would recommend that you change no one of them. In most situations, when you quit the BIOS or UEFI, you are asked if you want to save your changes, then simply say no to save any changes if you did accidentally.

You would have a BIOS or UEFI and there is no update if you have BIOS stuck without updating your motherboard, most possibly by upgrading other parts, such as RAM.

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