Technical SpecificationsSize and weight21.5-inch iMacHeight:17.75 inches (45.1 cm)Width:20.8 inches (52.8 cm)Depth:7.42 inches (18.85 cm)Weight:20.5 pounds (9.3 kg)127-inch iMacHeight:20.4 inches (51.7 cm)Width:25.6 inches (65.0 cm)Depth:8.15 inches (20.7 cm)Weight:30.5 pounds (13.8 kg)1Connections and expansionOne FireWire 800 port; 7 wattsFour USB 2.0 portsSD card slotCommunicationsBuilt-in AirPort Extreme 802.11n Wi-Fi wireless networking;2 IEEE 802.11a/b/g compatibleBuilt-in Bluetooth 2.1 + EDR (Enhanced Data Rate) wireless technologyBuilt-in 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)AudioBuilt-in stereo speakersTwo internal 17-watt high-efficiency amplifiersHeadphone/optical digital audio output (minijack)Audio line in/optical digital audio input (minijack)Built-in microphoneSupport for Apple Stereo Headset with microphoneiMac is designed with the following features to reduce its environmental impact: Arsenic-free display glassBFR-freePVC-free5Highly recyclable aluminum and glass enclosuresMeets ENERGY STAR 5.0 requirementsRated EPEAT Gold7Display Built-in 21.5-inch (viewable) or 27-inch (viewable) LED-backlit glossy widescreen TFTactive-matrix liquid crystal display with IPS technologyResolution21.5-inch models: 1920 by 1080 pixels27-inch models: 2560 by 1440 pixels16:9 aspect ratioMillions of colors at all resolutionsTypical viewing angle: 178�horizontal; 178�verticalTypical brightness: 320 cd/m2 (21.5-inch models); 375 cd/m2 (27-inch models)27-inch model can be attached to a wall mount, articulating arm, or other VESA-compliantmounting solution using the optional VESA Mount Adapter KitGraphics and video support21.5-inch models, one of the following:NVIDIA GeForce 9400M graphics processor with 256MB of DDR3 SDRAM shared with mainmemory3ATI Radeon HD 4670 graphics processor with 256MB of GDDR3 memory 27-inch model with dual-core processor
