To run the Enterprise Edition, your machine must meet at least these specifications:
Intel Pentium III or compatible 600MHz or higher processor (1 gigahertz or higher recommended)
300400MB of drive space to start
128MB of RAM (512MB or more recommended)
In addition to the SQL Server software, you must install a few other software components (on editions other than Mobile), such as the following:
TCP/IP
Microsoft Windows Installer 2.0 (SQL Server will install if needed)
Microsoft Internet Explorer 6.0 Service Pack 1 or higher
Internet Information Services 5.0 or higher (for Reporting Services)
Microsoft .NET Framework 2.0 (SQL Server will install if needed)