Computer performance is determined by the CPU (central processing unit), motherboard, graphics card, network card, sound card, etc. If the motherboard and graphics card are not good, no matter how good the CPU is, it will not work. These 5 Among them, the CPU, motherboard, and graphics card play a larger role in determining computer performance.(Recommended study:phpstorm)
1. Operation speed: Computer operation speed refers to the number of instructions that can be executed per second. The same computer performs different operations. The time required may vary, so the speed of operation is often described in different ways. Commonly used ones include CPU clock frequency (main frequency), average number of instructions executed per second (ips), etc.
2. Internal memory capacity: The size of the internal memory capacity reflects the computer's ability to store information instantly. The larger the memory capacity, the more powerful the system is and the larger the amount of data it can process.
3. Capacity of external memory: The larger the capacity of external memory, the more information can be stored and the richer the application software that can be installed.
4. I/O speed: The speed of host I/O 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.
5. Video memory: The performance of video memory is determined by two factors, one is capacity and the other is bandwidth. The capacity 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.
When evaluating a computer system, in addition to the structure, function and other characteristic parameters of the machine being evaluated, it is also closely related to the input, that is, the workload of the computer system.
A computer system being evaluated often exhibits higher performance for one workload and lower performance for another workload. In order to objectively evaluate the performance of a computer system, it is necessary to select a truly representative workload. Benchmark testing programs at different levels are usually used to evaluate system performance.
1. Use practical applications. Such as C language or various compilers developed in C; Photoshop graphics processing software, Premiere and CAD tool software.
2. Use core procedures. This is to extract a small number of key loop program segments from the actual program and use them to evaluate performance, but these core programs only have the value of evaluating performance.
3. Toy benchmark test program. Toy benchmark programs are usually only 10 to 100 lines long and the results are predictable. Popular because it is small and easy to type and works on any machine.
4. Synthetic test program. It is similar to the core program method, but this synthetic test is manually compiled. Popular synthetic test programs include WinBench 99, 3DMMARK2001, WhatCPUIs, etc. Especially WinBench 99, the test results it provides are very convincing and authoritative. Therefore, when most newspapers and magazines introduce new hardware, the data provided are test results from WinBench 99.
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