Pay Close Attention to the Minimum Software Requirements!!!

http://technet.microsoft.com/en-us/library/hh205990.aspx

Minimum Software Requirements

Operations Manager 2012 server features require a supported operating system. For a list of the supported operating systems for each server feature, see theRequirements by Feature section in this document.

Note the following database considerations for Operations Manager 2012:

• Operations Manager 2012 does not support a 32-bit Operations Manager Operations database, Reporting Server data warehouse, or Audit Collection database, or SQL Server Reporting Services on a 64-bit operating system.
  
• The use of SQL Server 2008 R2 is supported for both new installations of Operations Manager 2012 and SQL Server 2008 R2 database upgrades.
  
• Using a different version of SQL Server for different Operations Manager 2012 features is not supported. The same version should be used for all features.
  
• SQL collation for all databases must be SQL_Latin1_General_CP1_CI_AS; no other collation configurations are supported.
  
• The SQL Server Agent service must be started, and the startup type set to automatic.
  
• If you plan to use the Network Monitoring features of Operations Manager 2012, you should move the tempdb database to a separate disk that has multiple spindles. For more information, see tempdb Database.