Apple iMac 21.5" Intel Core i3 3.07GHz 4GB RAM Processor and memory 3.06GHz Intel Core i3 processor with 4MB level 3 cache; supports Hyper-Threading 4GB (two 2GB SO-DIMMs) of 1333MHz DDR3 SDRAM Display Built-in 21.5-inch (viewable) LED-backlit glossy widescreen TFT active-matrix liquid crystal display with IPS technology Resolution: 1920 by 1080 pixels Typical brightness: 330 cd/m2 Millions of colors at all resolutions Typical viewing angle: 178° horizontal; 178° vertical 16:9 aspect ratio Graphics and video support 3.06GHz ATI Radeon HD 4670 graphics processor with 256MB of GDDR3 memory iSight camera Mini DisplayPort output with support for DVI, VGA, and dual-link DVI (adapters sold separately) Support for extended desktop and video mirroring modes Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display Audio Built-in stereo speakers Two internal 17-watt high-efficiency amplifiers Headphone/optical digital audio output (minijack) Audio line in/optical digital audio input (minijack) Built-in microphone Support for Apple iPhone headset with microphone Connections and expansion One FireWire 800 port; 7 watts Four USB 2.0 ports SDXC card slot Communications AirPort Extreme 802.11n Wi-Fi wireless networking;2 IEEE 802.11a/b/g compatible Bluetooth 2.1 + EDR (Enhanced Data Rate) wireless technology 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector) Storage5 3.06GHz 500GB 7200-rpm Serial ATA hard drive Optical drive Slot-loading 8x SuperDrive (DVD±R DL/DVD±RW/CD-RW) Writes DVD+R DL and DVD-R DL discs at up to 4x speed Writes DVD-R and DVD+R discs at up to 8x speed Writes DVD-RW discs at up to 6x speed and DVD+RW discs at up to 8x speed Reads DVDs at up to 8x speed Writes CD-R discs at up to 24x speed Writes CD-RW discs at up to 16x speed Reads CDs at up to 24x speed Electrical and operating requirements Line voltage: 100-240V AC Frequency: 50Hz to 60Hz, single phase Maximum continuous power: 241W Operating temperature: 50° to 95° F (10° to 35° C) Storage temperature: -4° to 116° F (-20° to 47° C) Relative humidity: 5% to 95% noncondensing Maximum altitude: 10,000 feet Typical acoustical performance Sound pressure level (operator position): 18 dBA at idle6