The consoles went on sale on Friday in the US and Canada. Andrew House, president and group CEO for Sony Computer Entertainment, said in a release on Sunday that sales remain strong in North America.
The company will launch the gaming system in Europe and Latin America on November 29.
Sony has said it expects to sell five million units by the end of its fiscal year in March.
The PlayStation 4 is Sony’s first new video game console in seven years. It faces competition from Microsoft Corp’s new Xbox One, which goes on sale this week.
But unlike seven years ago, video game systems are also now competing against tablets, smartphones and other gadgets for the attention of gamers.