iMac 21.5 (Late 2009) vs iMac 27 (Mid 2011)

iMac 21.5 (Late 2009) $1,199
iMac 27 (Mid 2011) $1,699
Base Price (MSRP)
$1,199
Base Price (MSRP)
$1,699
CPU
Core 2 Duo E7600
CPU
Core i5-2500S
GPU
GeForce 9400M
GPU
Radeon HD 6770M Mac MXM
Memory
4GB
Memory
4GB
Storage
500GB
Storage
256GB
Display
21.5" LCD IPS 1920×1080
Display
27" LCD IPS 2560×1440

GB6 Single-Core

  • 36% slower vs iMac 27 (Mid 2011)
  • 55% faster vs iMac 21.5 (Late 2009)
iMac 21.5 (Late 2009) - GB6S 370
x1
iMac 27 (Mid 2011) - GB6S 575
x1.55

GB6 Multi-Core

  • 62% slower vs iMac 27 (Mid 2011)
  • 2.66x faster vs iMac 21.5 (Late 2009)
iMac 21.5 (Late 2009) - GB6M 620
x1
iMac 27 (Mid 2011) - GB6M 1,650
x2.66

FP32

  • 95% slower vs iMac 27 (Mid 2011)
  • 18.51x faster vs iMac 21.5 (Late 2009)
iMac 21.5 (Late 2009) - 35 GFLOPS FP32
x1
iMac 27 (Mid 2011) - 648 GFLOPS FP32
x18.51
CPU Image
Core 2 Duo E7600
2 Cores
2 Threads
3.06GHz Clock
CPU Image
Core i5-2500S
4 Cores
4 Threads
2.7GHz Clock
Core 2 Duo E7600 vs Core i5-2500S Full Specs Comparison
GPU Image
GeForce 9400M
16 Shaders
450MHz
Shared Memory
GPU Image
Radeon HD 6770M Mac MXM
480 Shaders
675MHz
512MB GDDR5
50.8GB/s Bandwidth
35 GFLOPS FP32
0%
648 GFLOPS FP32
1%
GeForce 9400M vs Radeon HD 6770M Mac MXM Full Specs Comparison
4GB
DDR3-1066
4GB
DDR3-1333
8 Tabs
2%
8 Tabs
2%
500GB
3.5"
SATA 2
-
256GB
2.5"
SATA 2
Up to 190MB/s
930 min 4K Video
23%
442 min 4K Video
11%
8x SuperDrive DL
Slot Loading
8x SuperDrive DL
Slot Loading
21.5"
LCD IPS
27"
LCD IPS
21.5"
27"
Area
197.5 in² (1274.3 cm²)
16:9 Aspect Ratio
Area
311.5 in² (2009.7 cm²)
16:9 Aspect Ratio
Brightness
300 Nits
Brightness
375 Nits
Refresh Rate
60Hz
Refresh Rate
60Hz
Resolution
1920×1080
2.1 Million Pixels
102 PPI
Resolution
2560×1440
3.7 Million Pixels
109 PPI
1920×1080
2560×1440
LED Backlight
1,000:1 Contrast
LED Backlight
1,000:1 Contrast
Viewing Angles
178° Horizontal
178° Vertical
Viewing Angles
178° Horizontal
178° Vertical
Colour Depth
8-bit
Colour Depth
8-bit
Coverage
100% sRGB
Coverage
100% sRGB
1920×1080
2560×1440
480p
480p
Apple Wireless Keyboard
Apple Wireless Keyboard
Magic Mouse
Magic Mouse
No Biometrics
No Biometrics
2
2
1
1
No Cellular
No Cellular
Wi-Fi 4E (802.11n)
2 Stream
Up to 300Mbps
Wi-Fi 4E (802.11n)
3 Stream
Up to 450Mbps
Bluetooth 2.1
Bluetooth 2.1
X48
ICH9
Z68
Data
4x USB 2.0 (480Mbps)
-
Data
4x USB 2.0 (480Mbps)
2x Thunderbolt 1 (10Gbps)
Network
1x Ethernet (1Gbps)
Network
1x Ethernet (1Gbps)
Video
1x mini-DisplayPort 1.1
-
-
Audio
2x Audio Jack
Audio
2x Audio Jack
Card
1x SDHC Card
Card
1x SDXC Card
205W
310W
Mac OS X 10.6 Snow Leopard
Windows
Mac OS X 10.6 Snow Leopard
Windows
macOS 10.13 High Sierra (Latest)
Windows 7 (Latest)
macOS 10.13 High Sierra (Latest)
Windows 7 (Latest)
Build Material
Aluminum
Build Material
Aluminum
Height
451 mm (17.8 in)
Width
528 mm (20.8 in)
Depth
188 mm (7.4 in)
Volume
44.89 L
Height
518 mm (20.4 in)
Width
650 mm (25.6 in)
Depth
207 mm (8.1 in)
Volume
69.75 L
Weight
9.299 kg (20.5 lb)
Weight
13.835 kg (30.5 lb)
CPU
Upgradable
CPU
Upgradable
GPU
Upgradable
GPU
Upgradable
Memory
Upgradable
Memory
Upgradable
Storage
Upgradable
Storage
Upgradable
Wi-Fi
Upgradable
Wi-Fi
Not Upgradable
Motherboard
Not Upgradable
Motherboard
Not Upgradable
Power Supply
Not Upgradable
Power Supply
Not Upgradable
Memory Slots
4x SO-DIMM
Memory Slots
4x SO-DIMM
A1311
EMC 2308
iMac10,1
A1312
EMC 2429
iMac12,2
Change Comparison