oct half term Flashcards
more cache means
better performance because more data can be stored closer to to the CPU as control unit automatically checks it first rather than the RAM
more cores doesn’t mean necessarily more speed because what
CPU cores have to communicate with each other through channels and this uses up some of the extra speed.
more clock speed makes CPU what
CPU becomes faster as it has more cycles it goes through per second
it will however use more energy and create more heat and probs be more expensive
what is over clocking
when people increase their CPU clock speed so they overheat
the CPU cannot keep up with all the instructions per second so data is corrupt
clock definition
contains internal clock used to regulate number of cycles per second and synchronise with other components
control unit
decoded instructions and tells each components what each instruction needs from them
arithmetic logic unit
calculator of the CPU - handles logical operations (AND NOT OR)
buses
parallel wires which transport data between components
registers
small and fast memory locators
fetch
instructions are loaded into memory (RAM) before the processor runs the program
instructions are fetched from memory (in order) and put into the appropriate registers
the control unit can then access the instruction for the next stages
decode
the binary representation of an instruction needs to be decoded
this is the process the control unit uses to work out what the other components need to do
execute
once instruction is decoded it will be executed
control unit tells other components what it needs to do
