FUD Zilla reports the slowest Core i3 chip from Intel will have a frequency of 2.93GHz. This LGA1156 chip is named Core i3 530, it's a dual-core 32nm Clarkdale with Hyperthreading support. Turbo overclocking mode isn't supported on the Core i3 5x0 series, but the Core i3 6x0 chips will have this functionality.
The CPU comes with 4MB cache, support for DDR3 1066 and 1333 and its integrated IGP works 733MHz. It will also support Intel clear video HD technology and it will operate under 73W TDP envelope. This TDP is actually very good as it includes CPU and graphics core, CPU itself should be around 60W it not even less.