Sorry but I actually don't visit this site all that much.
You can PM me at UBB where I visit daily or send me an IM to
[email protected]System Requirements for Windows Small Business Server 2003 R2
http://www.microsoft.com/windowsserver2003/sbs/evaluation/sysreqs/default.mspxWindows Small Business Server 2003 R2 supports a maximum of 75 users or devices. The computer running Windows Small Business Server 2003 R2 should be in the Intel Pentium/Celeron family or the AMD K6/Athlon/Duron family or have a compatible processor. Both editions support up to two CPUs on one server.
Note: A single hyperthreading processor counts as one CPU.
Note: A dual-core processor counts as one CPU.
However for a Quad-Core I'm guessing that they determine it to be 2 CPUs and thus you can't see or use the other one.
Compare the Editions of Windows Server 2003http://www.microsoft.com/technet/windowsserver/evaluate/features/compare.mspx