 "Apple iMac 21.5-inch 2.5GHz Quad-core i5 (Mid 2011) MC309LL/A" "iMac 21.5" | macofalltrades"
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Apple Part Number: MC309LL/A

Hardware Configuration
21.5-inch LED-backlit glossy widescreen TFT LCD display with IPS, 1920x1080 resolution2.5GHz quad-core Intel Core i5 processor4.0GB (2x2.0GB) PC3-10600 (1333MHz) DDR3 SO-DIMM, supports up to 32.0GB500GB Serial ATA hard disk drive @ 7200RPMDVD-RW/CD-RW SuperDrive-DLAMD Radeon HD 6750M graphics with 512MB GDDR5 memoryAirPort Extreme wireless card (802.11a/b/g/n)Bluetooth 2.1 + EDRBuilt-in FaceTime HD camera1- Thunderbolt port4- USB 2.0 ports1- FireWire 800 port1- Ethernet port1- Secure Digital (SDXC) slotPower Cable Included" 
 "Apple iMac 27-inch 3.2GHz Quad-core i5 (Late 2012) MD096LL/A" "iMac 27" | macofalltrades"
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Apple Part Number: MD096LL/A

Hardware Configuration
27-inch LED-backlit glossy widescreen TFT LCD display with IPS, 2560x1440 resolution3.2GHz quad-core Intel Core i5 processor with Turbo Boost up to 3.6GHz8.0GB (4x2.0GB) PC3-12800 (1600MHz) DDR3 SO-DIMM, supports up to 32.0GB1.0TB Fusion DriveNVIDIA Geforce GTX 680MX graphics with 2.0GB GDDR5 memoryAirPort Extreme wireless card (802.11n)Bluetooth 4.0Built-in FaceTime HD camera2- Thunderbolt ports4- USB 3.0 ports1- Ethernet port1- Secure Digital (SDXC) slotPower Cable Included" 