PS4 Gives Up To 5.5GB Of RAM To Developers
 

It looks like the Xbox One isn't the only console coughing up a big chunk of RAM for its operating system. Maybe Sony and Microsoft should just kick retail units up to 12GB - 16GB and call it good. Current PlayStation 4 dev kits have a "Game Memory Budget Mode" in the debug settings featuring two options: normal and large. The normal mode setting confirms that 4.5GB of memory is usable for game applications. The large mode increases this considerably to 5.25GB, but the docs are clear that the extra RAM here is only available for application development, presumably in order to house debugging data. From what we understand, the extra gig of flexible memory appears to work in addition to these allowances.
http://www.hardocp.com/news/2013/07/...am_developers/