All arithmetical and logical procedures inside a computer/server configuration are addressed by its Central Processing Unit, or CPU. This hardware part is oftentimes called the "brains" of the PC also. The rate at which the CPU completes system instructions is commonly referred to as its speed which is measured in Hertz. The speedier the processing unit is, the faster scripts and web programs will be executed, even though the performance of the latter depends on other things too - the read/write speed of the hard disk, the amount of physical memory, the network connection, and many others. All new CPUs have numerous cores, that work together. Subsequently, the effectiveness and the workload a CPU can handle increase, due to the fact that each and every core can process a number of tasks independently and numerous cores can handle 1 task which can't be processed by one core.