When selecting hardware for your computers running Microsoft® Exchange Server, there are many things that you must consider. Two of the most critical resources are processor and memory.
This article provides rough guidelines for processor and memory configurations that provide good performance for Exchange Server 2003 while also providing a strong platform for Exchange Server 2007. Recommendations will also be made on how server hardware deployed for Exchange 2003 roles can be reused for Exchange 2007 on a per-server role basis (for example, Mailbox and Client Access server roles). With this in mind, I have tried to make safe or highly confident predictions concerning what processor and memory configurations work well for Exchange 2007 server roles to help administrators maintain current Exchange 2003 environments with an eye toward the future.