iMac 21.5 (Retina 4K, Mid 2017) vs iMac 27 (Mid 2020) Full Specs
CPU | CPU |
GPU | GPU |
Memory | Memory |
Storage | Storage |
Display 21.5" LCD IPS4096x2304 500Nits 60Hz Glossy AR | Display 27" LCD IPS5120x2880 500Nits 60Hz Glossy AR |
Price $1,299 | Price $1,799 |
4 Cores 4 Threads 3GHz | 6 Cores 12 Threads 3.1GHz |
768 Shaders 850MHz | 1,280 Shaders 1.65GHz |
2GB GDDR5 | 4GB GDDR6 |
2x SO-DIMM | 4x SO-DIMM |
1.4GB/s Read 700MB/s Write | 2.8GB/s Read 1.3GB/s Write |
1x 2.5" |
21.5" LCD IPS4096x2304 500Nits 60Hz Glossy AR | 27" LCD IPS5120x2880 500Nits 60Hz Glossy AR |
Panel & HDR LCD IPS | Panel & HDR LCD IPS |
Area & Aspect Ratio 197.5 in²
16:9 | Area & Aspect Ratio 311.5 in²
16:9 |
Brightness 500 nits
500 nits Peak | Brightness 500 nits
500 nits Peak |
Refresh & VRR 60Hz | Refresh & VRR 60Hz |
Response Time 27 ms | Response Time 27 ms |
Resolution 4096x2304
9.4M Pixels
219 ppi | Resolution 5120x2880
14.8M Pixels
218 ppi |
Backlight & Contrast LED
1.1K:1 contrast | Backlight & Contrast LED
1.1K:1 contrast |
Viewing Angles 178° H
178° V | Viewing Angles 178° H
178° V |
Color Depth 10-bit | Color Depth 10-bit |
Color Coverage 100% sRGB
99% DCI-P3 | Color Coverage 100% sRGB
99% DCI-P3 |
Coating & Lamination Glossy AR
Fully Laminated | Coating & Lamination Glossy AR
Fully Laminated |
Touchscreen No | Touchscreen No |
External Display Mode No | External Display Mode No |
Border Size 23 mm (0.91") | Border Size 23 mm (0.91") |
Data 2x Thunderbolt 3 4x USB 3.0 | Data 2x Thunderbolt 3 4x USB 3.0 |
Network 1x Ethernet | Network 1x Ethernet |
Audio 1x Audio Jack | Audio 1x Audio Jack |
Card Slots 1x SDXC Card UHS-II | Card Slots 1x SDXC Card UHS-II |
Wi-Fi 5 Bluetooth 4.2 | Wi-Fi 5 Bluetooth 5.0 |
Power Supply 185W | Power Supply 303W |
Max Power Draw - | Max Power Draw 354W |
Speakers 2 | Speakers 2 |
Microphones 2 | Microphones 3 |
Launch OS macOS 10.12 Sierra | Launch OS macOS 10.15 Catalina |
Secondary OS Windows 10 | Secondary OS Windows 10 |
Build Material Aluminum | Build Material Aluminum |
Height 450 mm (17.72")Width 528 mm (20.79")Depth 175 mm (6.89") | Height 516 mm (20.31")Width 650 mm (25.59")Depth 203 mm (7.99") |
Weight 5.67 kg | Weight 8.94 kg |
Volume 41.58 L | Volume 68.0862 L |
Fans 1 | Fans 1 |
Release Date 2017-05-05 | Release Date 2020-08-04 |
Warranty 1 year | Warranty 1 year |
Description Retina 4K, Mid 2017 | Description Mid 2020 |
Model ID iMac18,2 | Model ID iMac20,1 |
Model Number 1 A1418 | Model Number 1 A2115 |
Model Number 2 EMC 3069 | Model Number 2 EMC 3442 |