The iMac Core i5 / 2.5 with 21.5-inch screen got the brand new quad processor of the time – Intel Core-i5 Sandy Bridge. This is the all-in-one desktop computer in an all-aluminum unibody casing behind the 21.5 LED-backlit IPS screen, covered by an edge-to-edge front glass and mounted on an aluminum stand with a slightly tapered foot and an adjusting hinge. The Core i5 2.5 21.5-inches (mid-2011) features a quad core 2.5 GHz Intel Core i5 I5-2400S processor (Sandy Bridge), with an innovating DMI system bus to connect the northbridge and the southbridge, and an integrated graphics core, 4 GB of RAM, a 500GB GB (7200 RPM), a slot-loading DVD+R DL Super Drive, an SD memory slot card reader, AMD Radeon HD 6750 graphics with 512 MB of shared memory, a built-in FaceTime HD webcam and stereo speakers, as well as a Firewire “800”, 4 USB 2.0 ports. It also has built-in draft and enabled AirPort Extreme (802.11g) and Bluetooth 2.1+EDR, Gigabit Ethernet and a “Thunderbolt” port. “Thunderbolt” port is a proprietal Apple port supporting the peripherals and a second display, since it is backwards compatible with a Mini DisplayPort. The cooling system is CPU controlled and the in-built speakers are mounted beneath the 21.5-inches screen for the clearer less distorted sound to bounce off the desk or other surface. The speakers’ grills also work as the vent ones. The iMac Core i5 I5-2400S (mid-2011) is shipped with a compact aluminum Apple Wireless Keyboard and a new multi-touch “Magic Mouse” An aluminum remote control and a multi-touch Magic Trackpad are optional and available for an extra cost.
iMac Core i5 / 2.5 21.5-Inch (Mid-2011)
Introduced on: May 3, 2011.
- Codename: Intel Mac Unibody.
- Processor Speed: 2.5 GHz.
- Processor Architecture: 64-bit.
- Processor type: Core i5 (I5-2400S) “Sandy Bridge”.
- Processor upgrade: LGA 1155 (Socket H2).
- Cores: 4.
- Graphics core: Yes.
- On-Board RAM: 4 GB, DDR3 1333 MHz (one 2GB module per slot, two slots free).
- Max. RAM: 32 GB.
- Video: 21.5″ LED-backlit TFT active matrix LCD, 16:9 widescreen, 1920 x 1080 pixels max resolution, viewing angle: 178° horizontal and 178° degrees vertical.
- Webcam: FaceTime HD camera 720p, 0.9 MP, 1280 x 720 resolution.
- Graphics: AMD Radeon HD 6750 graphics with 512 MB of shared memory.
- Storage: 500GB, 7200-rpm Ultra ATA-66 hard drives.
- SSD supported: 2.5”.
- Input\Output: 4x USB 2.0, 1 Firewire 800, 1 “Thunderbolt” port, built-in microphone, built-in speakers, audio out, audio input/output, FaceTime HD webcam.
- Optical drive: 8X DVD+R DL “Super Drive”.
- Card reader: SDXC card.
- Card format: SDXC.
- Internet \ Wireless connection: Integrated Airport Extreme 802.11 a/b/g/n, Gigabit Ethernet Optional 56k V.92 USB modem, Bluetooth 2.1+EDR, built-in infrared (IR) receiver for Apple Remote.
- OS: Preinstalled OS: X 10.6.6 (10J4026). OS max. upgrade: current.
- Dimensions: 17.75 x 20.8 x 7.42 inch.
- Average Weight: 20.5 lb.
Apple Orders, Discontinuation, Price
Apple Model No: A1311 (EMC 2428).
Apple Order Number: MC309LL/A.
Discontinued: October 23, 2012.
- Although the Core i5 I5-2400S processor (Sandy Bridge) has 4 cores, it is slower than its dual core predecessors due to the lower power consuming function.
- The S-letter in 2400S marks the mobile processor for laptops and portable devices. While only a couple of cores is loaded, the processor shows decent performance, but with all four cores under the load, the processor slows by half to decrease the cores temperature.
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Apple iMac A1311 21.5 intel core I5 2.5GHz. Video uploaded by Jorge Romlop on August 18, 2016.