SharePoint 2013 Enterprise and SQL Server 2012 Standard edition vs. Enterprise - feature question

Question

I can't seem to find any clear answers to the implications of installing SQL Server 2012 standard edition vs. enterprise in regards to SharePoint 2013. 
I understand that to get many of the features you need Enterprise edition of SQL 2012; but, what I can't figure out is if the backend SharePoint SQL 2012 is standard; but, the PowerPivot/SSRS server is Enterprise will we still get the features?
If we have 3 tier SharePoint farm, one of those tiers is for the SQL Server database backend.  If that SQL instance is 2012 standard and we add another server to the farm w/ SQL 2012 Enterprise to handle the tabular models, PowerPivot, and SSRS in integrated
mode will we still get the features?
Or, can we (should we) install Enterprise 2012 as the SharePoint database backend and let that instance triple down as also the PowerPivot and SSRS instance?
The Degenerate Dimension

Answer 1

Hi MMilligan,
SQL Server 2012 Standard is not supported PowePivot for SharePoint . In addition, SQL Server 2012 Standard is also not support some Reporting Services Features.
For more information, please refer to Features Supported by the Editions of SQL Server 2012:
http://msdn.microsoft.com/en-us/library/cc645993.aspx.
Install SQL Server BI Features with SharePoint 2013 (SQL Server 2012 SP1):
http://msdn.microsoft.com/en-us/library/jj218795.aspx.
If you have any problem, please feel free to let me know.
Thanks.
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Maggie Luo
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