Hardware vs. Software

The major different between hardware and software is the processing speed and capacity. In software, all the tasks are processed in sequential manner as shown in figure below while on the other hand the hardware models work on parallel processing phenomenon, where all the independent tasks are executed in parallel. So in example given below, sequential processing will take about 3 clock system (assuming each task consumes 1 clock cycle) while on the other hand, the parallel processing will take only 1 clock cycle to execute the whole process.