Xbox One or PS4 [PlayStation 4]: Which New Video Game Console Should You Buy? A Comparison of Xbox 1 and PS4 Price, Features, Specs, Games and Release Dates eBook by Eric Michael -
Amazon.com: PlayStation 4 Slim 1TB Gold Console [Discontinued] : Video Games
PlayStation 4 - Wikipedia
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Sony PS4 specifications
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PS4 tech specs: 'supercharged PC architecture,' x86 CPU, 8 GB memory (update) - Polygon
PS4 Pro Specs - The Tech Explained - YouTube
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PlayStation 4 - Wikipedia
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