The processor, also known as central processing units, regarded by us as the brains of our PC, is tasked to perform operations.
These operations are synchronized through a component called clock, it can be deduced that the greater is the clock frequency (number of basic operations per second) greater are the operations that the CPU is able to carry out in a time interval.
The question that arises might be this:
How does the CPU to perform operations?
First you need to figure out how to make up a CPU and how reasons:
- It reasons through the binary language which provides two states that are defined high = 1, low = 0 also known as bits
- It is composed of an arithmetic logic unit said ALU, which is able to perform arithmetic and logical operations.
- Another component present in the CPU is the computer of floating point operations that the same ALU would be able to play but with bad performance, this takes the name of the FPU, component not to be underestimated considering that all the big software and reason games with these numbers.
- The registers that store the entry and operations of output ALU.
- The bus travels where our information.
We go to very simply describe how the CPU does the following:
When the PC operates a reset that clears the registers of the CPU, then the reset will be initialized to some sub-initialize the registers of the CPU with the new operations to be performed, which will be synchronized by the clock.
The latter will initiate the intervention of ALU which carry out the requested operation (attention is not said that the ALU, will respond in one clock cycle, this will depend on the architecture of the processor, in fact a 32-bit processor will be able to perform 2 ^ 32 operations per cycle, so if the operation requires a number of basic operations larger than 2 ^ 32, the completion of this will use more clock cycles).
When finished using the output registers will store the result, which will be routed through the bus to the device that has requested it.
This process is described in a few words it is to understand how thinks a processor and what it actually does, but it is a minimal description seen the complexity.
The goal of this guide is to understand what is the best choice for buying a processor, for the moment we realized that the capabilities and performance depends on:
- Architecture (as is the structured CPUs, the number of bits etc.)
- Clock rate (the higher, the better the performance)
- Cache (greater its capacity greater will be the speed of the machine, in fact, his task is to store the calculation operations, to make them faster in the future)
- Front Side Bus (component through which the processor exchanges information with the RAM)
- Core (microprocessors that support the main unit, it is like having a machine with multiple processors)
- Price (not least since the computer components lose value in a short time)
So the relationship between price and performance indicates the best purchase.
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