Not at this time. It may be included in the next generation of servers, but at this time, it is not supported.  Regards, 
I'm installing a PCI USB 3.0 card in our R900 server.  This card requires a SATA power connector.  I'm unable to locate any internal power connections, SATA or Molex.  I also can't find anything in the R900 documentation that gives any indication on where I might find one. Any assistance would be appreciated.  Thanks!
PowerEdge R900 Internal Power Connections