The technical performance indicators of the computer mainly refer to the word length, operation speed, internal and external memory capacity and the main frequency of the CPU; the larger the word length, the faster the computer processes data; the operation speed refers to every second The number of instructions that can be executed; the larger the internal and external memory capacity, the greater the amount of data that can be processed; the main frequency refers to the clock frequency at which the CPU core works.
The technical performance indicators of the computer mainly refer to the word length, operation speed, internal/external memory capacity and CPU frequency.
Main performance indicators of computers:
1. Operation speed
Operation speed is an important indicator to measure computer performance. The commonly referred to computer computing speed (average computing speed) refers to the number of instructions that can be executed per second, which is generally described as "million instructions/second" (mips, MillionInstructionPerSecond). The same computer may take different times to perform different operations, so different methods are often used to describe the operation speed. Commonly used ones include CPU clock frequency (clock frequency), average number of instructions executed per second (ips), etc. Microcomputers generally use the main frequency to describe the computing speed. For example, the main frequency of Pentium/133 is 133 MHz, the main frequency of Pentium III/800 is 800 MHz, and the main frequency of Pentium 41.5G is 1.5 GHz. Generally speaking, the higher the main frequency, the faster the computing speed.
2. Word length
A group of binary numbers processed by a computer at the same time is called a "word" of a computer, and the number of digits in this group of binary numbers is the "word length". All other indicators being equal, the larger the word length, the faster the computer can process data. The word lengths of early microcomputers were generally 8 and 16 bits. Currently, most 586s (Pentium, PentiumPro, PentiumII, PentiumIII, Pentium4) are 32-bit, and most people now have 64-bit installed.
3. Internal memory capacity
Internal memory, also referred to as main memory, is a memory that the CPU can directly access. Programs that need to be executed and data that need to be processed are stored in the main memory. . The size of internal memory reflects the computer's ability to store information instantly. With the upgrade of operating systems, the continuous enrichment of application software and the continuous expansion of functions, people's demand for computer memory capacity is also constantly increasing. Currently, running the Windows95 or Windows98 operating system requires at least 16M of memory capacity, while WindowsXP requires more than 128M of memory capacity. The larger the memory capacity, the more powerful the system is and the larger the amount of data it can handle.
4. Capacity of external memory
External memory capacity usually refers to the hard drive capacity (including built-in hard drive and removable hard drive). The larger the external memory capacity, the more information can be stored and the richer the application software that can be installed. At present, hard disk capacity generally ranges from 10G to 60G, and some have even reached 120G.
5. I/O speed
The host I/O speed depends on the design of the I/O bus. This does not matter much for slow devices (such as keyboards and printers), but the effect is very obvious for high-speed devices. For example, for the current hard disk, its external transfer rate has reached more than 20MB/S and 4OMB/S.
6. Video memory
The performance of video memory is determined by two factors, one is capacity and the other is bandwidth. Capacity is easy to understand. Its size determines how much data can be cached. In terms of bandwidth, it can be understood as the channel for exchanging data between the video memory and the core. The larger the bandwidth, the faster the data exchange. Therefore, capacity and bandwidth are key factors in measuring video memory performance.
7. Hard drive speed
RotationalSpeed is the rotation speed of the motor spindle in the hard drive, which is the maximum number of revolutions that the hard drive platter can complete in one minute. The speed of rotation is one of the important parameters that indicates the grade of the hard disk. It is one of the key factors that determines the internal transmission rate of the hard disk and directly affects the speed of the hard disk to a large extent.
8. Main frequency
The main frequency of the CPU is the clock frequency at which the CPU core works. What is usually said is the MHz of a certain CPU, and this MHz is the "main frequency of the CPU".
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