PlayStation 4 gives up to 5GB of RAM to game developers | Eurogamer.net
A Comparison of Playstation 4 Models
Used - Like New: NVG-003 Sony Playstation 4 PRO AMD Jaguar 4GB RAM Polaris Motherboard 1-983-932-31 Laptop Motherboards Security Locks & Accessories - Newegg.com
PS4 Pro Sony PlayStation 4 Pro 1TB Black Console
PS4 Pro Vs PS4 Slim: What's The Difference?
PS4 Pro Priced and Dated for the Middle East
Amazon.com: Rear USB Type-A Port Replacement Repair Part for Playstation 4 PS4 Pro : Video Games
PS4 Pro's additional RAM frees up memory for game developers - Polygon