(a) On-Chip parallelism (b) A coprocessor (c) A multiprocessor (d) A multi computer (e) A grid
When two CPUs or processing unit are close together, have a high bandwidth and low delay between them, and are computationally intimate, they are said to be tightly coupled. Conversely, when they are far apart, have a low bandwidth and high delay and are computationally remote, they are said to be loosely coupled.
