Like Workstation 4.0, the NT Server we tested wasn't fully performance-tuned. Again, we can confirm improvements in video performance (though this is of questionable value on a server). Beyond that, Microsoft claims that network transport interface improvements have significantly boosted performance on fast Ethernet. Other sources tell us that what this really amounts to is relaxation of a bug that prevented NT 3.x from fully exploiting fast Ethernet. There's also a print spooler functionality change that improves client response by off-loading page rendering to the server.
