No terminations on point to point DDR3?
For a single DDR device with just one connection to address/command, using VTT termination is optional. Not using VTT termination can have lower performance as the signal margins will be reduced. Nevertheless it's very common on small systems with just one rank down on board.
This kind of connection relies on the host driver internal series resistance to absorb reflections from the far end. The signal looks quite horrible at the driver pin, but will be ok at the receiver.