Complex sentence: Intel officially announced CPUs based on this microarchitecture on June 4,2013 at Computex Taipei 2013, while a working Haswell chip was demonstrated at the 2011 Intel Developer Forum.
Split into simpler sentences: Intel officially announced CPUs with this microarchitecture on June 4,2013 at Computex Taipei 2013. Intel demonstrated a working Haswell chip at the 2011 Intel Developer Forum.