The 27-inch iMac 5K (Mid 2017) with an i7 processor was a configurable high-end version of Apple's all-in-one desktop, equipped with a 7th-generation "Kaby Lake" processor. It was a significant upgrade from its predecessors, notably including Thunderbolt 3 ports and a brighter display.
Processor
Model: The optional top-tier processor was a 4.2GHz quad-core Intel Core i7-7700K with Turbo Boost speeds up to 4.5GHz.
Display
Technology: It features a 27-inch Retina 5K display with IPS technology and a resolution of 5120 x 2880.
Graphics
Processor: The top graphics option paired with the i7 processor was the AMD Radeon Pro 580 with 8GB of VRAM.
External Displays: The Thunderbolt 3 ports could support a single external 5K display or two external 4K displays alongside the built-in 5K screen.
Memory, storage, and connectivity
This model included 16GB of 2400MHz DDR4 memory, but this was user-upgradable via four SO-DIMM slots to a maximum of 64GB.
Storage: 1 TB Fusion Drive
Ports: Two versatile Thunderbolt 3 (USB-C) ports. It also included four USB 3 ports, an SDXC card slot, a 3.5mm headphone jack, and a Gigabit Ethernet port.
Wireless: This iMac included 802.11ac Wi-Fi and Bluetooth 4.2.