The iMac A1224 has a 2.0-2.4Ghz Intel "Core 2 Duo" processor. That means two independent processor "cores" on a single chip. This machine packs: 4GBs of RAM; a 1TB hard drive disk; and has been installed with the latest Apple OS X El Capitan operating system.
A 20-inch glossy screen with TFT Active Matrix LCD display (1680x1050 native)
Vertically-mounted slot-loading DVD "SuperDrive"
NVIDIA GeForce 9400M graphics with 128 MB of memory shared with the system
Built-in iSight video camera
Built-in stereo speakers underneath the screen