iMac 27 (Mid 2011) vs iMac 21.5 (Late 2011)

iMac 27 (Mid 2011) $1,699
iMac 21.5 (Late 2011) $999
Base Price (MSRP)
$1,699
Base Price (MSRP)
$999
CPU
Core i5-2500S
CPU
Core i3-2100
GPU
Radeon HD 6770M Mac MXM
GPU
Radeon HD 6750M Mac MXM
Memory
4GB
Memory
2GB
Storage
256GB
Storage
250GB
Display
27" LCD IPS 2560x1440 -
Display
21.5" LCD IPS 1920x1080 -
Core i5-2500S
4 Cores
4 Threads
2.7GHz Clock
Core i3-2100
2 Cores
4 Threads
3.1GHz Clock
GB6S 575
14%
GB6M 1,650
6%
GB6S 465
11%
GB6M 940
4%
Radeon HD 6770M Mac MXM
480 Shaders
675MHz
512MB GDDR5
50.8GB/s Bandwidth
Radeon HD 6750M Mac MXM
480 Shaders
598MHz
256MB GDDR5
50.8GB/s Bandwidth
N/A
0%
FP32 0.65 TFLOPS
1%
N/A
0%
FP32 0.57 TFLOPS
1%
4GB
DDR3-1333
2GB
DDR3-1333
8 Tabs
2%
Unknown # Tabs
0%
256GB
2.5"
SATA 2
Up to 190MB/s Read
250GB
3.5"
SATA 3
7200RPM
442 min 4K Video
11%
430 min 4K Video
11%
8x SuperDrive DL
Slot Loading
8x SuperDrive DL
Slot Loading
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27"
LCD IPS
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21.5"
LCD IPS
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375 Nits
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300 Nits
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60Hz
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60Hz
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2560x1440
3.7 Million Pixels
109 PPI
1920x1080
2.1 Million Pixels
102 PPI
LED Backlight
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1,000:1 Contrast
LED Backlight
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1,000:1 Contrast
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480p
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480p
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Apple Wireless Keyboard
Apple Wireless Keyboard
Magic Mouse
Magic Mouse
Not Included
Not Included
Not Included
Not Included
No Biometrics
No Biometrics
2
2
1
1
No Cellular
No Cellular
Wi-Fi 4E (802.11n)
3 Stream
Up to 450Mbps
Wi-Fi 4E (802.11n)
2 Stream
Up to 300Mbps
Bluetooth 2.1
No Bluetooth
No Sensors
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No Sensors
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Z68
Z68
Data
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4x USB 2.0 (480Mbps)
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2x Thunderbolt 1 (10Gbps)
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Data
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4x USB 2.0 (480Mbps)
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Network
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1x Ethernet (1Gbps)
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Network
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1x Ethernet (1Gbps)
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Video
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1x mini-DisplayPort 1.1
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Audio
2x Audio Jack
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Audio
2x Audio Jack
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Card
1x SDXC Card
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Card
1x SDXC Card
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310W
205W
Not Included
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Not Included
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No Battery
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No Battery
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Mac OS X 10.6 Snow Leopard
Windows
Mac OS X 10.7 Lion
Windows
macOS 10.13 High Sierra (Latest)
Windows 7 (Latest)
macOS 10.13 High Sierra (Latest)
Windows 7 (Latest)
Build Material
Aluminum
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Build Material
Aluminum
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Height
518 mm (20.4 in)
Width
650 mm (25.6 in)
Depth
207 mm (8.1 in)
Volume
69.75 L
Height
451 mm (17.8 in)
Width
528 mm (20.8 in)
Depth
188 mm (7.4 in)
Volume
44.89 L
Weight
13.835 kg (30.5 lb)
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Weight
9.299 kg (20.5 lb)
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CPU
Upgradable
CPU
Upgradable
GPU
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
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Memory Slots
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4x SO-DIMM
Memory Slots
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4x SO-DIMM
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A1312
EMC 2429
iMac12,2
A1311
EMC 2496
iMac12,1
Change Comparison