Project Server 2013 and Microsoft® SQL Server® 2014 Supported?
I have received a number of questions from our customers lately asking if SQL Server 2014 is supported for use with SharePoint 2013 and Project Server 2013.
According to the Hardware and software requirements for Project Server 2013 documentation.... As long as your environment is post Service Pack 1 you will be able to utilize Microsoft® SQL Server® 2014.
I hope this clears up the question as you plan for your Project Server 2013 deployment.