Question : Problem: Dual-core Xeon vs. Dual-core non-xeon processor

With all of these non-xeon Dual Core processors on the market is there an advantage to using a Dual-Core xeon, on a server (Windows Server 2003), as opposed to a non-xeon processor?

Answer : Problem: Dual-core Xeon vs. Dual-core non-xeon processor

In a business server, yes.  You can't get a system that supports multiple CPUs running non-XEON processors.  Sure you get the multi cores, but which is better for a SQL server - 2xQuad Core Xeons or a single Quad Core Pentium?