Please refer to the Implementation Guide for Microsoft CRM for hardware and software requirements.

Direct link to System requirements here http://msdn.microsoft.com/en-us/library/dd979161.aspx

Download link for full implementation guide here
http://www.microsoft.com/downloads/details.aspx?FamilyID=1ceb5e01-de9f-48c0-8ce2-51633ebf4714&displaylang=en