iMac 27 (Mid 2017) vs iMac 21.5 (Late 2015)
iMac 27
(Mid 2017)
$1,799
iMac 21.5
(Late 2015)
$1,099
|
Base Price (MSRP)
$1,799
|
Base Price (MSRP)
$1,099
|
|
CPU
Core i5-7500
|
CPU
Core i5-5250U
|
|
GPU
Radeon Pro 570
|
GPU
HD 6000 950MHz
|
|
Memory
8GB
|
Memory
8GB
|
|
Storage
128GB
|
Storage
128GB
|
|
Display
27" LCD IPS 5120×2880
|
Display
21.5" LCD IPS 1920×1080
|
GB6 Single-Core
|
|
iMac 27 (Mid 2017) - GB6S 1,280
x1.57
iMac 21.5 (Late 2015) - GB6S 815
x1
GB6 Multi-Core
|
|
iMac 27 (Mid 2017) - GB6M 3,515
x2.25
iMac 21.5 (Late 2015) - GB6M 1,565
x1
FP32
|
|
iMac 27 (Mid 2017) - 3.96 TFLOPS FP32
x5.42
iMac 21.5 (Late 2015) - 730 GFLOPS FP32
x1
|
3.96 TFLOPS FP32
8%
|
730 GFLOPS FP32
1%
|
|
8GB
DDR4-2133
|
8GB
DDR3-1866
|
|
24 Tabs
5%
|
24 Tabs
5%
|
|
128GB
Proprietary Apple 12+16 Pin
PCIe 3.0 x4
Up to 1.4GB/s
|
128GB
Proprietary Apple 12+16 Pin
PCIe 3.0 x4
Up to 1.3GB/s
|
|
186 min 4K Video
5%
|
186 min 4K Video
5%
|
|
|
|
|
27"
LCD IPS
|
21.5"
LCD IPS
|
|
27"
|
21.5"
|
|
Area
311.5 in² (2009.7 cm²)
16:9 Aspect Ratio
|
Area
197.5 in² (1274.3 cm²)
16:9 Aspect Ratio
|
|
Brightness
500 Nits
|
Brightness
350 Nits
|
|
Refresh Rate
60Hz
|
Refresh Rate
60Hz
|
|
Response Time
27ms GtG
|
-
-
|
|
Flicker
23000Hz
|
-
-
|
|
Resolution
5120×2880
14.7 Million Pixels
218 PPI
|
Resolution
1920×1080
2.1 Million Pixels
102 PPI
|
|
5120×2880
|
1920×1080
|
|
LED Backlight
1,100:1 Contrast
|
LED Backlight
1,000:1 Contrast
|
|
Viewing Angles
178° Horizontal
178° Vertical
|
Viewing Angles
178° Horizontal
178° Vertical
|
|
Colour Depth
10-bit
|
Colour Depth
8-bit
|
|
Coverage
100% sRGB
99% DCI-P3
88% Adobe RGB
|
Coverage
100% sRGB
-
-
|
|
Accuracy
dE 1.4 Avg
dE 2.6 Max
dE 2.20 Greyscale
2.32 Gamma
6830K
|
-
-
-
-
-
-
|
|
Coating
Glossy Anti-Reflective
Fully Laminated
|
Coating
Glossy Anti-Reflective
Fully Laminated
|
5120×2880
1920×1080
|
720p
|
720p
|
|
Magic Keyboard
|
Magic Keyboard
|
|
Magic Mouse 2
|
Magic Mouse 2
|
|
No Biometrics
|
No Biometrics
|
|
2
|
2
|
|
2
|
2
|
|
No Cellular
|
No Cellular
|
|
|
|
|
|
|
|
Wi-Fi 5 (802.11ac)
3 Stream
Up to 1300Mbps
|
Wi-Fi 5 (802.11ac)
3 Stream
Up to 1300Mbps
|
|
Bluetooth 4.2
|
Bluetooth 4.0
|
|
Z170
|
Z87
|
|
Data
4x USB 3.0 (5Gbps)
-
2x Thunderbolt 3 (40Gbps)
|
Data
4x USB 3.0 (5Gbps)
2x Thunderbolt 2 (20Gbps)
-
|
|
Network
1x Ethernet (1Gbps)
|
Network
1x Ethernet (1Gbps)
|
|
Audio
1x Audio Jack
|
Audio
1x Audio Jack
|
|
Card
1x SDXC Card UHS-II
|
Card
1x SDXC Card
|
|
310W
|
185W
|
|
|
|
|
macOS 10.12 Sierra
Windows
|
OS X 10.11 El Capitan
Windows
|
|
macOS 13 Ventura (Latest)
Windows 10 (Latest)
|
macOS 12 Monterey (Latest)
Windows 10 (Latest)
|
|
Build Material
Aluminum
|
Build Material
Aluminum
|
|
Height
516 mm (20.3 in)
Width
650 mm (25.6 in)
Depth
203 mm (8 in)
Volume
68.13 L
|
Height
450 mm (17.7 in)
Width
528 mm (20.8 in)
Depth
175 mm (6.9 in)
Volume
41.63 L
|
|
Weight
9.435 kg (20.8 lb)
|
Weight
5.67 kg (12.5 lb)
|
|
CPU
Upgradable
|
CPU
Upgradable
|
|
GPU
Not Upgradable
|
GPU
Not Upgradable
|
|
Memory
Upgradable
|
Memory
Upgradable
|
|
Storage
Upgradable
|
Storage
Upgradable
|
|
Wi-Fi
Not Upgradable
|
Wi-Fi
Upgradable
|
|
Motherboard
Not Upgradable
|
Motherboard
Not Upgradable
|
|
Power Supply
Not Upgradable
|
Power Supply
Not Upgradable
|
|
-
-
|
Storage Slots
1x 2.5" Bay
|
|
Memory Slots
4x SO-DIMM
|
Memory Slots
2x SO-DIMM
|
|
A1419
EMC 3070
iMac18,3
|
A1418
EMC 2889
iMac16,1
iMac16,2
|
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