Active Directory Performance for 64-bit Versions of Windows Server 2003

This white paper compares the performance of the 64-bit Windows Server 2003 operating system and the 32-bit Windows Server 2003 operating system with Service Pack 1 (SP1) for Active Directory operations. It also investigates workloads for which the 64-bit version of the operating system outperforms the 32-bit version.

Read it at Microsoft