Computer hardware key performance indicators
Machine word
CPU can handle a number of bits of data.
A computer-digit integer arithmetic can be processed by binary data (i.e., fixed-point integer arithmetic integer arithmetic).
Because the computer indicating the number of fixed-point and floating-point have points, but also fixed point decimal point and fixed-point integer points, where said integer arithmetic i.e., fixed-point integer arithmetic.
Usually the width of the machine word CPU internal data paths.
Machine word reflects the operation precision of the computer, that is, the word length, the greater the number represents the range, the higher the accuracy.
Machine word length will also affect the machine's processing speed. If the CPU word length is shorter, but also more computing the number of data, you need to go through two or more operations to complete, this will inevitably affect the whole machine runs.
Machine word and the main memory word length is usually the same, but may be different. Under different circumstances, a main memory word length is generally less than the machine word size, for example, a 32-bit machine word, the main memory may be a 32-bit word length, and may be 16, of course, both of which can affect the efficiency of the CPU.
Clocked
CPU clock speed, i.e., the clock frequency of the CPU core operating (CPU Clock Speed). Commonly referred to as certain how much MHz CPU, and this is how many megahertz "CPU clock speed."
The higher the frequency, CPU processing speed is faster.
CPU clock speed represents the speed of the CPU within the digital pulse signal shock, and the actual CPU computing power and is not directly related (that is now level CPU clock speed does not directly affect the CPU computing power, not to say that no computing power impact. just because today's CPU speeds were lower, also as high frequency memory than other hardware).
Frequency is not equal to the number of instructions the processor executing a second article, because the execution of an instruction may require multiple clock cycles. For the CPU, under the premise of compatibility, mainly depends on the speed, the higher the frequency, the longer the byte, CPU speed faster.
Number of cores
It refers to a quad-core with four different functions based on a single semiconductor processor core processor. In other words, the four physical processor cores integrated into a core.
Quad-core and dual-core difference is that for the multi-tasking, open four quad-core CPU dual-core CPU program than four programs open faster, then there are multi-core making greater advantage when large amounts of data operations.
CPI
Number of clock cycles required to execute an instruction.
MIPS
Execute millions of instructions per second.
FLOPS
The number of floating point operations per second.
storage
The total number of bits to store binary information.
= The number of the storage capacity of the storage unit stores word length *. - only for main memory (RAM).