In the evolving landscape of computer firmware, Unified Extensible Firmware Interface (UEFI) and Compatibility Support Module (CSM) represent two distinct approaches that coexist within modern systems.
Compatibility
- UEFI: As the successor to legacy BIOS, UEFI supports contemporary hardware and technologies.
- CSM: Functioning as a component within UEFI, CSM provides backward compatibility, allowing older software to run on newer systems.
Security
- UEFI: Offers robust security features including Secure Boot and (Trusted Platform Module) TPM integration, enhancing protection against malware and unauthorized access.
- CSM: Lacks these advanced security features, making it less secure than UEFI for modern requirements.
Boot Speed
- UEFI: Utilizes Fast Boot technology, enabling faster boot times compared to CSM, nearly doubling the speed in some cases.
- CSM: Boots slower due to its reliance on traditional methods, which can be a consideration for users needing quick startup times.
OS Support
- UEFI: Default for 64-bit operating systems, supporting the latest software and applications.
- CSM: Allows installation of 32-bit operating systems, useful for legacy applications but less common with newer software.
UEFI represents the modern standard with enhanced features and security, while CSM provides a bridge for running legacy software.