The iMac "Core i5" 1.4 21.5-Inch Aluminum (Mid-2014/Haswell) features a 22-nm "Haswell" 1.4 GHz Intel "Core i5" processor (4260U) with two independent processor "cores" on a single chip, a 3 MB shared level 3 cache, 8 GB of onboard 1600 MHz LPDDR3 SDRAM.
Although the iMac Intel Aluminum came with 8 GB of RAM it could be upgraded up to 16 GB of RAM.