Modern servers use UEFI (Unified Extensible Firmware Interface) instead of legacy BIOS. Understanding the difference matters for boot configuration, security, and drive support.
Key Differences
| Feature | Legacy BIOS | UEFI |
|---|---|---|
| Boot Drive Size | Max 2TB (MBR) | No limit (GPT) |
| Secure Boot | No | Yes |
| Boot Speed | Slower | Faster |
| NVMe Boot | No | Yes |
| GUI Config | Text only | Mouse + graphics |
All Dell 13G+, HPE Gen9+, and Lenovo V1+ servers support UEFI. Legacy BIOS mode is still available for compatibility.