Sony makes the PS4 more powerful by unlocking an extra CPU core
How much difference it'll make however, remains to be seen
Sony Unlocks PS4's 7th Core For More Power - SlashGear
Sony PS4 upgrade to include UltraHD and richer graphics
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Sony shares a list of 39 titles that will be optimized for the PS4
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Sony Unlocks Seventh CPU Core On The PS4 For Game Developers
Sony unlocks PS4's seventh CPU core, data suggests - CNET
PS5 Guide: Ultimate PlayStation 5 Resource
Wow you guys this is crazy, it's looking like the Quest Pro will
PS5 review: An essential games console