Apple iMac 2017, 21.5-inch, Retina 4K Display, 3.0GHz Processor

3.0GHz quad-core Intel Core i5, Turbo Boost up to 3.5GHz
8GB 2400MHz DDR4
1TB Serial ATA Drive @ 5400 rpm
Radeon Pro 555 with 2GB video memory
Magic Mouse 2
Magic Keyboard - English
Display
Retina 4K display
21.5-inch (diagonal) Retina 4K display
4096-by-2304 resolution with support for one billion colors
500 nits brightness
Wide color (P3)
Processor
3.0GHz
3.0GHz quad‑core Intel Core i5 (Turbo Boost up to 3.5GHz)
Configurable to 3.6GHz quad-core Intel Core i7 (Turbo Boost up to 4.2GHz)
Memory
8GB of 2400MHz DDR4 onboard memory
Configurable to 16GB
Storage
1TB (5400-rpm) hard drive
Configurable to 1TB Fusion Drive or 256GB or 512GB SSD
Graphics
Radeon Pro 555 with 2GB of VRAM
Video Support and Camera
FaceTime HD camera
Simultaneously supports full native resolution on the built-in display at millions of colors (21.5-inch) or 1 billion colors (21.5-inch 4K) and:
One 5120‑by‑2880 (5K) external display at 60Hz with support for 1 billion colors, or
Two 3840-by-2160 (4K UHD) external displays at 60Hz with support for 1 billion colors, or
Two 4096‑by‑2304 (4K) external displays at 60Hz with support for millions of colors
Thunderbolt 3 digital video output
Native DisplayPort output over USB‑C
Thunderbolt 2, HDMI, DVI, and VGA output supported using adapters (sold separately)
Audio
Stereo speakers
Microphone
3.5 mm headphone jack
• Support for Apple iPhone headset with microphone
Connections and Expansion
3.5 mm headphone jack
SDXC card slot
Four USB 3 ports (compatible with USB 2)
Two Thunderbolt 3 (USB-C) ports with support for:
• DisplayPort
• Thunderbolt (up to 40 Gbps)
• USB 3.1 Gen 2 (up to 10 Gbps)
• Thunderbolt 2, HDMI, DVI, and VGA supported using adapters (sold separately)
10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
Kensington lock slot
Input
Magic Keyboard - Magic Keyboard comes standard with your iMac. It’s wireless and rechargeable (so you won’t be replacing batteries), with an ultracompact, edge-to-edge design that wastes no surface space. It has a stable scissor mechanism, optimized key travel, and a low profile that provide control and comfort. And it pairs immediately with your iMac right out of the box.)
Magic Keyboard with Numeric Keypad - You get all the functionality of Magic Keyboard, with an extended layout that makes it even easier to work and...