Client Performance
In addition to the many new desktop features that have been added to Windows 2000 Professional such as Plug and Play, power management, single worldwide binary for all languages, IntelliMirror^TM management technologies, and many others, the performance on the desktop is significantly faster than Windows 95 & 98 and comparable to Windows NT® Workstation 4.0. By optimizing fundamental system services such as memory management, registry access, and disk I/O, Windows 2000 is able to deliver the added benefit of new features while delivering the performance that customers expect.

Networking Performance
Windows 2000 is Gigabit ready. This means that Windows 2000 is capable of sustaining the highest levels of network throughput using Gigabit adapters. For example, using network adapters designed to utilize the advanced TCP/IP features in Windows 2000 such as TCP/IP checksum offloading and large send support, Windows 2000 can deliver up to 25% better network throughput than Windows NT Server 4.0 and sustain close to 4 gigabit per second (Gbps) of data throughput. With the improved networking efficiency provided by Windows 2000, customers will benefit from higher capacity Web servers, file servers, and application servers.

Web Server Performance
The performance of Web sites running Windows NT Server 4.0 can immediately be improved by upgrading to Windows 2000. Advances have been made in Windows 2000 that significantly improve Active Server Pages (ASP) performance and SMP scalability. In addition, ASP applications running in out-of-process mode perform significantly better on Windows 2000. For example, an ASP application running in out-of-process mode on Windows 2000 is as fast as the same ASP application running in the Web server process on Windows NT Server 4.0. Furthermore, the raw performance of serving static Web pages has increased significantly according to publicly available SPECWeb 96 results.

File & Print Server Performance
By improving many aspects of the file serve components such as increasing the virtual size of the file cache form 496MB to 960MB, optimizing the SMB redirector on Windows 2000, and optimizing the Windows NT File System (NTFS), Windows 2000 provides customers with a better performing and scalable file server solution. Using the NetBench benchmark, Windows 2000 Server with Windows 2000 Professional-based clients provides up to 20% better performance than Windows NT Server 4.0 with Windows NT Workstation 4.0-based clients. In some cases, especially where the file shares are stored on a single partition, Windows 2000 provides up to 2-times better file server performance than Windows NT Server 4.0.

As a print server, Windows 2000 is capable of processing up to 3-times more pages per second when compared to Windows NT Server 4.0. Moreover, as the chart to the left shows, print performance doesn't degrade on Windows 2000 Server as additional printers are added. Furthermore, Windows 2000 can perform the rendering in 1/3 of the time it took on Windows NT Server 4.0 and requires 1/3 of the CPU resources.

Application Server Performance
Windows 2000 Server is a better platform for running business applications. Better SMP scalability, improved networking performance, support for more physical memory have a profound impact on the performance of Windows 2000 in an application server environment. Advances to what is now known as COM+ (formerly COM and Microsoft Transaction Server) also provide better performance to customers running COM-based applications. In addition, transaction-processing capabilities of COM+ can be used as a transaction monitor when running to improve performance of database applications.