: Enhanced auditing and the introduction of Read-Only Domain Controllers (RODCs) for branch offices.

: A minimal installation option without a graphical user interface (GUI), reducing the attack surface and management overhead.

Despite the build update, the core hardware requirements for Windows Server 2008 remained relatively modest:

: A sub-system that can repair corrupted files in the background without needing to take the server offline. Technical Requirements

Technically, no. Microsoft never officially released an "SP3" for Windows Server 2008 or Windows Vista. Build 6003 is simply an updated version of SP2 designed to facilitate ongoing maintenance. Key Features and Capabilities