CPU Speed
> CPU Speed is called clock rate, the speed at which a microprocessor executes instructions.
> The CPU speed, or processor speed, is the amount of cycles that a CPU can perform per second.
> Every computer contains an internal clock that regulates the rate at which instructions are
> CPU Speed is called clock rate, the speed at which a microprocessor executes instructions.
> The CPU speed, or processor speed, is the amount of cycles that a CPU can perform per second.
> Every computer contains an internal clock that regulates the rate at which instructions are
executed and synchronizes all the various computer components.
> The CPU requires a fixed number of clock ticks (or clock cycles) to execute each instruction.
> The faster the clock, the more instructions the CPU can execute per second.
> CPU Speed is measured in Hertz.
For example, one Hertz means that one cycle can be completed in one second. A megahertz means that one million cycles can be completed in a second. A gigahertz means that one billion cycles can be completed per second.
> The faster the clock, the more instructions the CPU can execute per second.
> CPU Speed is measured in Hertz.
For example, one Hertz means that one cycle can be completed in one second. A megahertz means that one million cycles can be completed in a second. A gigahertz means that one billion cycles can be completed per second.
Note:- Following Points are Just for Understanding not for Explanation
> Does this mean that a 2GHz CPU is twice as fast as a 1Ghz CPU?
> Not necessarily. This depends on how much work each CPU accomplishes in each clock cycle.
> The 1GHz CPU might very well be faster, in practice, than the 2Ghz CPU if it is more efficient
> Does this mean that a 2GHz CPU is twice as fast as a 1Ghz CPU?
> Not necessarily. This depends on how much work each CPU accomplishes in each clock cycle.
> The 1GHz CPU might very well be faster, in practice, than the 2Ghz CPU if it is more efficient
or can process more tasks in each CPU cycle, which depends on its architecture.
> Modern CPUs typically have multiple cores, such as dual-core, quad-core, and even 6-core CPUs.
> This multiplies the amount of cycles a CPU can make per second, as each core can perform
its cycles in parallel to the other cores. That’s just one way two CPUs both rated at 2Ghz,
for example, can still have different real speeds. If one has more core than the other it can
do more in less time.
Dynamic Clock Speed Adjustments
> Modern CPUs also aren’t fixed at a single speed, particularly laptop, smartphone, tablet,
> Modern CPUs also aren’t fixed at a single speed, particularly laptop, smartphone, tablet,
and other mobile CPUs where power efficiency and heat production are major concerns.
> Instead, the CPU runs at a slower speed when idle (or when you’re not doing too much)
and a faster speed under load.
> The CPU dynamically increases and decreases its speed when needed. When doing
something demanding, the CPU will increase its clock rate, get the work done as quickly
as possible, and get back to the slower clock rate that allows it to save more power.
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