Can you try below driver? [URL] 
Hi,   I have a Dell PowerEdge R520 using Windows Server 2012 (not R2).  In the Open Manage admin I am receiving an error stating my PERC H710 Mini 'driver version is out of date'.  My current version is:6.801.05.00. It telling me to upgrade to 6.803.21.00. I can't find that driver. Thanks!      
Driver for PERC H710