Our .NET test was run on the recently released FuseTalk .NET collaboration application. For this test, we ran with configurations that would typically be used in a web server, which is why you won't see results for the Quad Xeons here.
The .NET platform is the new framework for building Windows-based and web-based applications from Microsoft. It not only replaces the older ASP platform, but introduces some up-to-date languages that run on the Common Language Runtime, which is the backbone of .NET. The three main languages used with .NET are: C#, VB.NET, and J#. Whatever language in which you write your code, it is compiled into an intermediate language - CIL (Common Intermediate Language). It is then managed and executed by the CLR (Common Language Runtime).
As you can see from the results below, the Dual Core Opteron 875 part posted a 30% gain over the fastest Dual Opteron 252. Take note that the Dual Core Opteron 875 is a lower clocked part than the 252; the 875 is clocked at 2.2 GHz while the 252 is clocked at 2.6 GHz.