UPGRADE YOUR PS4 SLIM!! (How to upgrade your PlayStation 4 Hard Drive) - YouTube
What graphics card, RAM, and specs do the PS4 and Xbox have? - Quora
CMS 16GB (2X8GB) DDR4 19200 2400MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Asus/Asmobile® RS Server RS100-E10-PI2, RS300-E10-PS4, RS300-E10-RS4 - C112 at Amazon.com
How to upgrade your PS4 hard drive to 4TB or more
PlayStation 4 Pro Teardown - iFixit
PlayStation 4 Hardware Specs - PlayStation 4 Wiki Guide - IGN
64GB (2X32GB) Memory RAM Compatible with ASUS/ASmobile RS500 E8 Series Server, E8-PS4 Server (Z10PR-D16), E8-PS4 V2 Server (Z10PR-D16) Load Reduced ECC only by CMS D17 - Computer Memory Solutions
OFFTEK 2GB Replacement Memory RAM Upgrade for AsRock H61M-PS4 (DDR3-10600 - Non-ECC) Motherboard Memory at Amazon.com
RedGamingTech
PlayStation 4 Slim Pulsing Blue Light Of Death BLOD Ram Reball And Replacement Without Stencils - YouTube
8GB DDR4 RAM Memory Upgrade for ASUS RS Server RS300-E9-PS4 (PARTS-QUICK) - Walmart.com
PlayStation 4 Teardown - iFixit
PlayStation 4 Pro Teardown - iFixit
Could Microsoft upgrade the Xbox One's hardware to fix the PS4 performance gap? - ExtremeTech