Unibody IMac
In October 2009, a 16:9 aspect ratio screen was introduced in 21.5" and 27" models, replacing the 20" and 24" 8:5 aspect ratio screens of the previous generation. Video card options entirely switched to AMD, save for the standard onboard Nvidia card in the base model. The iMac's processor selection saw a significant increase.
Default RAM has also been increased across the iMac range. With the advent of the larger screens, Apple doubled the number of memory slots from two to four. Consequently, the maximum memory capacity was also doubled (to 16GB).
On May 3, 2011, Intel's new Core i5 and Core i7 chips, based on the Sandy Bridge microarchitecture, became available standard. The current iMac ships with Bluetooth and AirPort cards, an internal FaceTime HD camera, a power cord, the Apple Wireless Keyboard, and the wireless Apple Magic Mouse or Apple Magic Trackpad.
| Component | Intel Core 2 Duo, Core i5, and Core i7 | Intel Core i3, Core i5, and Core i7 | Core i5, and Core i7 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model | Late 2009 | Mid 2010 | Mid 2011 | |||||||||
| Release date | October 20, 2009 | July 27, 2010 | May 3, 2011 | |||||||||
| Marketing Model Number | MB950xx/A | MC413xx/A | MB952xx/A | MB953xx/A | MC508xx/A | MC509xx/A | MC510xx/A | MC511xx/A | MC309xx/A | MC812xx/A | MC813xx/A | MC814xx/A |
| Model Number | A1311 | A1312 | A1311 | A1312 | A1311 | A1312 | ||||||
| EMC Number | 2308 | 2309 | 2374 | 2389 | 2390 | 2428 | 2429 | |||||
| Model ID | iMac10,1 | iMac10,2 | iMac11,1 | iMac11,2 | iMac11,3 | iMac12,1 | iMac12,2 | |||||
| Enclosure | Aluminum and glass | |||||||||||
| Display | 21.5 ", 1920 × 1080 | 27 ", 2560 × 1440 | 21.5 ", 1920 × 1080 | 27 ", 2560 × 1440 | 21.5 ", 1920 × 1080 | 27 ", 2560 × 1440 | ||||||
| glossy glass-covered widescreen 16:9, LED backlighting and IPS technology | ||||||||||||
| Processor | 3.06 GHz (E7600) Intel Core 2 Duo with 3MB on-chip L2 cache | 2.66 GHz i5 (750) with 8MB on-chip L3 cache | 3.06 GHz i3 (540) with 4MB on-chip L3 cache | 3.2 GHz i3 (550) with 4MB on-chip L3 cache| | 2.8 GHz i5 (760) with 8MB on-chip L3 cache | 2.5 GHz i5 (2400S) with 6MB on-chip L3 cache | 2.7 GHz i5 (2500S) with 6MB on-chip L3 cache| | 3.1 GHz i5 (2400) with 6MB on-chip L3 cache | ||||
| Optional: 3.33 GHz (E8600) Core 2 Duo with 6MB on-chip L2 cache | Optional: 2.8 GHz i7 (860) | Optional: 3.2 GHz i3 (550) or 3.6 GHz i5 (680) | Optional: 3.6 GHz i5 (680) | Optional: 2.93 GHz i7 (870) | Optional: 2.8 GHz i7 (2600S) | Optional: 3.4 GHz i7 (2600) | ||||||
| System bus | ||||||||||||
| Front Side Bus | Intel Direct Media Interface | |||||||||||
| 1066 MHz Optional: 1333MHz with 3.33 GHz Core 2 Duo option |
2.5GT/s | |||||||||||
| Memory | 4GB (two 2GB, two slots empty) Optional: 16GB |
4GB (two 2GB, two slots empty) Optional: 16GB |
4GB (two 2GB, two slots empty) Expandable to 32GB (16GB supported by Apple) |
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| 1066 MHz PC3-8500 DDR3 SO-DIMM SDRAM | 1333 MHz PC3-10600 DDR3 SO-DIMM SDRAM | |||||||||||
| Graphics | nVidia GeForce 9400M with 256MB shared memory | ATI Radeon HD 4670 with 256MB of GDDR3 SDRAM | ATI Radeon HD 4850 with 512MB of GDDR3 SDRAM | ATI Radeon HD 4670 with 256MB of GDDR3 SDRAM | ATI Radeon HD 5670 with 512MB of GDDR3 SDRAM | ATI Radeon HD 5750 with 1GB of GDDR5 SDRAM | AMD Radeon HD 6750M with 512MB of GDDR5 SDRAM | AMD Radeon HD 6770M with 512MB of GDDR5 SDRAM | AMD Radeon HD 6970M with 1GB of GDDR5 SDRAM Optional: with 2GB GDDR5 SDRAM |
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| Hard drive | 500GB Optional: 1TB or 2TB |
1TB Optional: 2TB |
500GB Optional: 1TB or 2TB |
1TB Optional: 2TB |
1TB Optional: 2TB and/or 256GB SSD |
500GB | 1TB Optional: 2TB and/or 256GB SSD |
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| Serial ATA 7200-rpm | ||||||||||||
| Optical drive | 8x double-layer SuperDrive (DVD±R DL/DVD±RW/CD-RW) | |||||||||||
| AirPort Extreme1 | Integrated 802.11a/b/g/n | |||||||||||
| Video out | Mini DisplayPort | 1 Thunderbolt port | 2 Thunderbolt ports | |||||||||
| Mini DisplayPort to VGA, DVI, HDMI and DisplayPort adapters available | All Mini DisplayPort adapters supported | |||||||||||
| Camera | iSight Camera (640 x 480 0.3 MP) | FaceTime HD camera 720p (1280 x 720 0.9 MP) | ||||||||||
Read more about this topic: IMac (Intel-based)