The PS4 will have 8GB of RAM to use on the system, but Sony has clarified that only 5GB of this will be available to developers to use with games. Of the 5GB available, 4.5GB will be “Direct Memory” and 512MB will be “Flexible Memory”, managed by the PS4 OS on the game’s behalf, but 100% available to the game.
Sony Clarify that 5GB of RAM Available for PS4 Games
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