Complex sentence: Cayman is based on new 4-way VLIW architecture, which was chosen over AMD's older VLIW5 in order to reduce complexity in the design of AMD's stream processors.
Split into simpler sentences: Cayman is based on new 4-way VLIW architecture. VLIW4 was chosen over AMD's older VLIW5 in order to reduce complexity in the design of AMD's stream processors.