iMac 27 (Mid 2011) vs iMac 20 (Early 2009)
iMac 27
(Mid 2011)
$1,699
iMac 20
(Early 2009)
$1,199
|
Base Price (MSRP)
$1,699
|
Base Price (MSRP)
$1,199
|
|
CPU
Core i5-2500S
|
CPU
Core 2 Duo E8135
|
|
GPU
Radeon HD 6770M Mac MXM
|
GPU
GeForce 9400M
|
|
Memory
4GB
|
Memory
2GB
|
|
Storage
256GB
|
Storage
320GB
|
|
Display
27" LCD IPS 2560×1440
|
Display
20" LCD TN 1680×1050
|
GB6 Single-Core
|
|
iMac 27 (Mid 2011) - GB6S 575
x1.72
iMac 20 (Early 2009) - GB6S 335
x1
GB6 Multi-Core
|
|
iMac 27 (Mid 2011) - GB6M 1,650
x2.87
iMac 20 (Early 2009) - GB6M 575
x1
FP32
|
|
iMac 27 (Mid 2011) - 648 GFLOPS FP32
x18.51
iMac 20 (Early 2009) - 35 GFLOPS FP32
x1
|
648 GFLOPS FP32
1%
|
35 GFLOPS FP32
0%
|
|
4GB
DDR3-1333
|
2GB
DDR3-1066
|
|
8 Tabs
2%
|
Unknown # Tabs
0%
|
|
256GB
2.5"
SATA 2
Up to 190MB/s
|
320GB
3.5"
SATA 2
-
|
|
442 min 4K Video
11%
|
570 min 4K Video
14%
|
|
8x SuperDrive DL
Slot Loading
|
8x SuperDrive DL
Slot Loading
|
|
27"
LCD IPS
|
20"
LCD TN
|
|
27"
|
20"
|
|
Area
311.5 in² (2009.7 cm²)
16:9 Aspect Ratio
|
Area
179.8 in² (1159.8 cm²)
16:10 Aspect Ratio
|
|
Brightness
375 Nits
|
Brightness
290 Nits
|
|
Refresh Rate
60Hz
|
Refresh Rate
60Hz
|
|
-
|
-
|
|
-
|
-
|
|
Resolution
2560×1440
3.7 Million Pixels
109 PPI
|
Resolution
1680×1050
1.8 Million Pixels
99 PPI
|
|
2560×1440
|
1680×1050
|
|
LED Backlight
1,000:1 Contrast
|
CCFL Backlight
1,000:1 Contrast
|
|
Viewing Angles
178° Horizontal
178° Vertical
|
Viewing Angles
160° Horizontal
160° Vertical
|
|
Colour Depth
8-bit
|
Colour Depth
8-bit
|
|
Coverage
100% sRGB
|
Coverage
100% sRGB
|
|
-
|
-
|
|
-
|
-
|
2560×1440
1680×1050
|
480p
|
480p
|
|
Apple Wireless Keyboard
|
Apple Keyboard Al
|
|
Magic Mouse
|
Mighty Mouse
|
|
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
|
Bluetooth 2.1
|
|
Z68
|
GeForce 9400M
|
|
Data
4x USB 2.0 (480Mbps)
-
2x Thunderbolt 1 (10Gbps)
|
Data
4x USB 2.0 (480Mbps)
1x FireWire 800
-
|
|
Network
1x Ethernet (1Gbps)
|
Network
1x Ethernet (1Gbps)
|
|
-
-
|
Video
1x mini-DisplayPort 1.1
|
|
Audio
2x Audio Jack
|
Audio
2x Audio Jack
|
|
Card
1x SDXC Card
|
-
-
|
|
310W
|
200W
|
|
|
|
|
Mac OS X 10.6 Snow Leopard
Windows
|
Mac OS X 10.5 Leopard
Windows
|
|
macOS 10.13 High Sierra (Latest)
Windows 7 (Latest)
|
OS X 10.11 El Capitan (Latest)
Windows 7 (Latest)
|
|
Build Material
Aluminum
|
Build Material
Aluminum
|
|
Height
518 mm (20.4 in)
Width
650 mm (25.6 in)
Depth
207 mm (8.1 in)
Volume
69.75 L
|
Height
470 mm (18.5 in)
Width
485 mm (19.1 in)
Depth
188 mm (7.4 in)
Volume
42.85 L
|
|
Weight
13.835 kg (30.5 lb)
|
Weight
9.072 kg (20 lb)
|
|
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
|
|
Memory Slots
4x SO-DIMM
|
Memory Slots
2x SO-DIMM
|
|
A1312
EMC 2429
iMac12,2
|
A1224
EMC 2266
iMac9,1
|
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