This will vary depending on your equipment and if the games are available in HD. Not all games are provided to DIRECTV in HD. NHL CENTER ICE games are broadcast on Channels 769-785. HD games are represented by a "-1". For example, if the Ducks vs. Bruins game is broadcast in SD on Channel 769, you can see it in HD (if available) on Channel 769-1.
To access DIRECTV HD programming, HD equipment is required. The number of HD channels you receive is based on package selection.