A:AnswerYes it has built in speakers, although you will likely be disappointed with the quality of the speakers. The volume is too low even at 100. It seems like the speakers are playing through the back of the monitor so it sounds a little off.
This was not a concern for me though because I always wear a headset when gaming.
A:AnswerThis monitor can display and play games well with Nvidia Graphics card. However, the graphic card will have to support the features the monitor have to get all the full features.