When you deploy Windows to a UEFI-based device, you must format the hard drive that includes the Windows partition by using a GUID partition table (GPT) file system. Additional drives may use either the GPT or the master boot record (MBR) file format.MBR is compatible with legacy and older operating systems that do not support GPT. On the other hand, if you have a newer computer with UEFI firmware, GPT is recommended for better compatibility and support for modern features.UEFI mode is compatible with the GUID Partition Table (GPT) partition style while the legacy BIOS mode is compatible with the Master Boot Record (MBR) partition style.

Can I use GPT with BIOS : You can use GPT and BIOS – there's some subtle differences. You will need to create an unformatted partition size 8M-32M (Calamares uses 32M) and this partition must be of the type BIOS BOOT (0xEF02). When you install the bootloader using GPT you must install to partition e.g. /dev/sdyX.

When not to use GPT

When NOT to use GPT

1. Reasoning OUTSIDE the code layer. An example of this is to use ChatGPT for answering questions about the Dialogflow Conversation Layer.
2. Using it at the wrong level of abstraction.
3. Repetitive, modular NLP tasks.

Should I turn on UEFI : In general, install Windows using the newer UEFI mode, as it includes more security features than the legacy BIOS mode. If you're booting from a network that only supports BIOS, you'll need to boot to legacy BIOS mode. After Windows is installed, the device boots automatically using the same mode it was installed with.

UEFI enables better use of bigger hard drives. Though UEFI supports the traditional master boot record (MBR) method of hard drive partitioning, it doesn't stop there. It's also capable of working with the GUID Partition Table (GPT), which is free of the limitations the MBR places on the number and size of partitions.

For example, if you prefer faster boot time, using a GPT disk as the system disk is advisable; if your computer is BIOS-based, choose MBR for the system disk instead; while if you use a disk under 2TB for data storage, both GPT and MBR are OK.

Is UEFI faster than Legacy

UEFI (Unified Extensible Firmware Interface) is a newer standard that replaces the legacy BIOS. UEFI offers more features and benefits, such as faster boot times, better security, larger disk support, and graphical user interface. Legacy BIOS is the old mode that uses a 16-bit code and a limited number of options.In general, install Windows using the newer UEFI mode, as it includes more security features than the legacy BIOS mode. If you're booting from a network that only supports BIOS, you'll need to boot to legacy BIOS mode. After Windows is installed, the device boots automatically using the same mode it was installed with.Simply put, GPT is the better option in many ways. While the world is moving toward more advanced technologies, GPT with the latest tech compatibility trumps MBR. If your drive is more than 2 TB, or if you decided to set up a newer operating system like Windows 11, definitely go with GPT.

We recommend performing Windows® 10 installations enabling UEFI with a GUID Partition Table (GPT). Some features may not be available if you use the Master Boot Record (MBR) style partition table. We highly recommended performing a backup of your data.

Should all my drives be GPT : If you have a hard drive that you would like to use and it is 2 TB or smaller, select MBR when you initialize the hard drive for the first time. If you have a hard drive that you would like to use but not boot from and it is larger than 2 TB, select GPT (GUID).

Is UEFI faster than BIOS : Boot Speed: UEFI generally boots faster than BIOS, allowing for quicker system startup and reduced waiting times. Customizability: UEFI allows for more customization options, enabling users to personalize settings and optimize system performance to a greater extent than BIOS.

Why is UEFI faster

UEFI natively supports NVMe storage devices, providing efficient access to high-performance, non-volatile memory-based storage. Example: UEFI allows seamless integration of NVMe drives as boot devices, enabling faster storage access and improved overall system performance.

The disk must have an EFI partition to boot. You must have the built-in Diskpart.exe and Bootcfg.exe utilities to create bootable mirror volumes on GPT disks. You can do some of these steps with the Disk Management console, but others you can do only with the built-in Diskpart.exe utility.Nowadays, UEFI gradually replaces the traditional BIOS on most modern PCs as it includes more security features than the legacy BIOS mode and also boots faster than Legacy systems. If your computer supports UEFI firmware, you should convert MBR disk to GPT disk to use UEFI boot instead of BIOS.

Why is GPT so slow : The speed of Chat GPT is primarily affected by model complexity and server capacity, contributing to slow processing times.