Edexcel curriculum (2015)
Law & Legislation
Specification 2 has a higher clock speed and therefore will be able to deal with a greater number of instructions / cycles per second with the effect that processing will be faster than for Specification1.
Because of the higher clock speed the CPU in Specification 2 will use more energy and create more heat than the CPU in Specification 1.
The CPU cache memories and the bandwidths are the same.
Specification 1 has more RAM / a larger memory and will therefore be able to handle more programs and operations at the same time. The larger memory will reduce the extent of swapping with virtual memory / secondary storage which will go some way to offset the benefit provided by the greater clock speed of Specification 2.?
B - Register
One mark for name and one mark for use (must match)
Control Unit (CU)
o Sends signals to other components to coordinate the cycle
Arithmetic / Logic Unit (ALU)
o Performs arithmetic (+,-,/,*, etc.) and logic (AND,NOT, OR, etc.)
o Very fast storage locations which hold instructions, data, or memory addresses.
Cache (Not expected)
o Sits between components in the microprocessor to make up for the difference in physical speed of the components
o Holds the address of physical memory or the address of an input/output device that is to be read from/written to
o If an instruction needs data, the data is loaded onto the data bus before being read by the CPU
o All data/instructions moved here to go to or from Memory
o Provides the timing for the cycle