Key Technical Specifications & PropertiesDisplay & VisualsScreen Size: 27-inch (diagonal) Retina 5K displayResolution: $5120 \times 2880$ pixels at 218 ppiBrightness & Color: 500 nits brightness, Wide Color (P3) gamut, supporting up to 1 billion colorsProcessor & GraphicsProcessor (CPU): 7th-Gen “Kaby Lake” Intel Core i5 (Quad-Core @ 3.4GHz, 3.5GHz, or 3.8GHz, Turbo Boost up to 4.2GHz) — Configurable to 4.2GHz Quad-Core Core i7Graphics (GPU): AMD Radeon Pro 570 (4 GB GDDR5), Radeon Pro 575 (4 GB GDDR5), or Radeon Pro 580 (8 GB VRAM)Memory & StorageRAM: 8 GB (2x 4 GB) 2400 MHz DDR4; User-upgradeable via 4 accessible SO-DIMM slots (up to 64 GB)Storage Options: 1 TB / 2 TB Fusion Drive standard, or PCIe-based SSD options (256 GB, 512 GB, 1 TB, or 2 TB)Connectivity & Expansion PortsPorts:2x Thunderbolt 3 (USB-C) ports (supports DisplayPort, Thunderbolt up to 40 Gbps, USB 3.1 Gen 2)4x USB 3.0 (Type-A) portsSDXC card slotGigabit Ethernet (RJ-45)3.5 mm headphone jackWireless: 802.11ac Wi-Fi & Bluetooth 4.2Audio, Camera & Physical BuildAudio & Video: Stereo speakers, dual microphones, and 720p FaceTime HD cameraDesign: Slim aluminum unibody enclosure tapering down to 5 mm at the edgesDimensions & Weight: 51.6 cm (H) x 65.0 cm (W) x 20.3 cm (D); Weight: 9.44 kg (20.8 lbs)