Does installing SQL Server on a dedicated computer improve performance?

Yes. If you install SQL Server on a stand-alone, dedicated computer it has full access to all of the computer's system resources. If you install SQL Server and the RMH apps on the same computer, the RMH apps will utilize some of the computer's system resources.

Note: Installing SQL Server on a stand-alone, dedicated computer is also advantageous because it is easier to perform updates or maintenance on the computer if it is not being used as a POS terminal or back office workstation.