Compared to the older “legacy” BIOS firmware, UEFI firmware offers many new and useful features, including: Greatly improved security
Fully specified interfaces that ensure interoperability and testability
Dependable firmware updates from the internet with minimal user interaction
Support for hard drives larger than 2.2TB
Support for many new types of PC hardware, including NVMe SSD boot support
Windows® Secure Boot for malware prevention
Faster shutdown, startup, sleep, and resume times To fully leverage the benefits of UEFI, only UEFI Mode will be officially supported starting from the AMD R