The imac "core 2 duo" 3.06 21.5-inch aluminum (late 2012) features a 3.06 ghz intel "core 2 duo" processor (e7600), with two independent processor "cores" on a single silicon chip, a 3 mb shared level 2 cache, a 1066 mhz system bus, 2gb of ram (1066 mhz pc3-8500 ddr3 sdram), 160gb (7200 rpm) hard drive, a vertically-mounted slot-loading dvd�r dl "superdrive", and nvidia geforce 9400m graphics with 256 mb of shared memory or ati radeon hd 4670 graphics with 256 mb of dedicated gddr3 memory.