Computer Science 1.1

.... a quartz crystal is used to measure the speed the FDE cycle takes to complete (in Hz). It shows home many instructions can be processed and how many FDE cycles per second.

• bus speed

• multi-core processors

• clock speed

• cache memory

instead of just having one processor a dual-core processor has CPUs working together which can each perform the FDE cycle simultaneously, this means the computer can process more instructions in the same amount of time.

• bus speed

• multi-core processors

• clock speed

• cache memory

... is a very fast memory which can work at a similar speed to the CPU. It stores frequently used instructions and data. This provides faster access than RAM as it is closer to the CPU.

• bus speed

• multi-core processor

• clock speed

• cache memory

Data is sent around the system in 'buses', a bus is a connection between the different parts of the motherboard. ... affects how quickly data can move around the computer, and therefore affects the speed of the computer.

• bus speed

• multi-core processors

• clock speed

• cache memory

Select all the factors which affect CPU performance

• clock speed

• number of cores

• amount of cache memory

• bus speed

What does CPU stand for?

What does the CPU do?

• it is the brain of the computer

• it is a temporary memory

• processes instructions and carries out the FDE cycle

• controls, processes and unites

Select all the main parts of the CPU

• cache memory

• arithmetic and logic unit

• RAM

• the control unit

.... is responsible for decoding instructions, it also sends electrical signals to control how data moves around the CPU and memory in order to execute these instructions.

• arithmetic and logic unit

• control unit

• cache memory

... performs calculations and comparisons.

• arithmetic and logic unit

• control unit

• cache memory