Termination resistors with DDR3, are they needed?
As already noted, you should definitely have terminations to Vtt (0.75V for standard DDR3). This source must be able to both sink and source current. There are regulators available for this specific task.

The address and control group should be DC terminated (I used 40.2 ohm parts) and the clock pair should be ac terminated (clock and complement each with 40 ohm resistors, both tied to a 100nF cap which then goes to Vtt).

Note that there are many register settings that control DDR3 memory interfaces, and you have to be careful to get them all correct.

Micron remains a wonderful source of information on using DDR3 as well as anything else they make.