Multicore designs are computer processor architectures that integrate two or more independent processing units, known as cores, onto a single integrated circuit chip to execute instructions concurrently. By distributing workloads across multiple execution units rather than relying solely on increasing the operating frequency of a single processor, these architectures enhance overall throughput and energy efficiency for parallel computations. Multicore designs encompass various chip configurations, including homogeneous topologies where all cores share identical microarchitectures, heterogeneous structures that combine high-performance cores with power-efficient or specialized units, and massively parallel organizations. Across modern central and graphics processing units, these designs require careful balancing of interconnect communication, memory hierarchy, thermal limits, and power dissipation constraints to maximize performance across diverse computing workloads.