A rookie friend who just bought a computer complained to Meng. Seeing that many people are playing overclocking now, he simply fiddled with it a few times to improve the speed of the CPU. He is envious and wants to overclock, but he is afraid to do it. After hearing this, Meng immediately talked to him about some overclocking tips. Want to know what these tricks are?
Attention! Know before overclocking.
Meng: overclocking is a hobby of many computer players. It can improve hardware performance with little or no money on the basis of existing hardware. Of course, for friends who don't know much about computers, overclocking is both pleasant and scary. In fact, you don't have to envy the overclocking results promoted by DIY players. As long as you know the principle and operation method of overclocking, you can also play overclocking
Rookie: I am confident when I say this, so what is overclocking?
Meng: Computer overclocking is to artificially increase the working frequency of CPU, graphics card and other hardware to make it work stably above the rated frequency. Take the CPU of Intel P4C 2.4GHz as an example. Its rated working frequency is 2.4GHz. If the working frequency is raised to 2.6GHz, the system can still run stably and overclocking will be successful.
Novice: overclocking is like this, so what is the principle of overclocking?
Meng: Let's say the CPU is overclocked. Its main purpose is to improve the working frequency of CPU, that is, the main frequency of CPU. The main frequency of CPU is the product of external frequency and frequency doubling. For example, the external frequency of a CPU is 100MHz, and the frequency multiplication is 8.5. You can calculate its main frequency = external frequency × frequency doubling = 100 MHz × 8.5 = 850 MHz.
Improving the main frequency of CPU can be achieved by changing the frequency doubling or external frequency of CPU. However, if you use IntelCPU, you can ignore the frequency doubling as much as possible, because Intel CPU adopts special manufacturing technology to prevent the modification of frequency doubling. AMD's CPU can modify the frequency doubling, but the improvement of CPU performance by modifying the frequency doubling is not as good as the external frequency.
The speed of external frequency is usually closely related to the speed of front-end bus and memory. So when you increase the CPU external frequency, the performance of CPU, system and memory will also improve, which is why Dier likes overclocking.
Rookie: How to overclock?
Meng: OK, let's take you into CPU overclocking practice now.
There are two main ways of overclocking: one is hardware setting and the other is software setting. Hardware settings are commonly used, including jumper settings and BIOS settings.
1. Jumper set overclocking.
Most of the early motherboards used jumpers or DIP switches to overclock. Near these jumpers and DIP switches, tables are often printed on the motherboard to record the functions defined by the combination of jumpers and DIP switches. When it is turned off, you can set it according to the frequency in the table. After the restart, if the computer starts normally and can run stably, it means that we have succeeded in overclocking.
Figure 1 is an Intel 845D chipset motherboard used with Celeron 1.7GHz, which uses jumper overclocking. Under the inductance coil, we can see the description table of jumper. When the jumper is set to 1-2 mode, the external frequency is 100MHz, and when it is changed to 2-3 mode, the external frequency is raised to 133MHz. The default external frequency of Celeron 1.7GHz is 100MHz. If we upgrade the external frequency to 133MHz, the original Celeron 1.7GHz will be overclocked to 2.2GHz, isn't it very simple?
Fig. 2 is the motherboard of VIA KT266 chipset used with AMD CPU, and the CPU frequency doubling is set by DIP switch setting. AMD's frequency doubling is mostly frequency-unlocked, and it can be overclocked by modifying the frequency doubling. This is a five-group DIP switch, which can be combined into more than ten modes through different on-off states of serial number switches. An explanatory table is printed on the upper right of the DIP switch, explaining the changes of different frequencies brought by the DIP switch in different combination modes.
For example, if we overclock an AMD 1800+, we must first know that the main frequency of Athlon XP 1800+ is equal to 133MHz external frequency × 1 1.5 times. As long as we increase the frequency doubling to 12.5, the CPU frequency will become133mhz×12.5 ≈1.6ghz, which is equivalent to Athlon XP 2000+. If we increase the frequency doubling to 13.5, the CPU frequency becomes 1.8GHz, which makes the overclocking of Athlon XP 1800+ Athlon XP2200+. Simple operations will greatly improve performance, which is very interesting.
Rookie: Great, so you can save hundreds of dollars:) How to overclock in BIOS again? [Page]
2.BIOS setting overclocking
Meng: Now mainstream motherboards basically give up jumper settings and DIP switch settings to change CPU frequency doubling or external frequency, but use more convenient BIOS settings.
For example, Abit's SoftMenu III and EPOX's PowerBIOS belong to BIOS overclocking mode, and CPU frequency doubling and external frequency can be set in CPU parameter settings. If the computer can't start normally after overclocking, as long as it is turned off and restarted by pressing INS or HOME key, the computer will automatically return to the default working state of CPU, so overclocking in BIOS is better.
In this paper, the combination scheme of upgrading NF7 motherboard and Athlon XP 1800+ CPU is adopted to realize this overclocking practice. At present, there are two main brands of BIOS on the market, one is Phoenix Award BIOS and the other is AMI BIOS. Take the Award BIOS as an example.
First, start the computer and press the DEL key to enter the BIOS setup interface of the motherboard. Select the soft menu III setting from the BIOS (as shown in Figure 3), which is to upgrade the overclocking function of the motherboard.
After entering this function, we can see that the system automatically recognizes the CPU as 1800+. We need to enter here and change the default recognition model to user-defined mode (Figure 4).
After setting the manual mode, the CPU external frequency and frequency multiplier that cannot be selected in gray can now be selected (Figure 5).
If you need to use boost external frequency overclocking, just press enter here. External clock: 133 MHz. There are many external frequencies to adjust. You can adjust it to the frequency option of 150MHz or higher. Because increasing the external frequency will increase the system bus frequency and affect the stability of other devices, the method of locking PCI frequency must be adopted.
The frequency doubling factor is the place to adjust the frequency doubling of CPU. Enter the option area (as shown in Figure 6), and you can choose frequency doubling according to the actual situation of CPU, such as 12.5, 13.5 or higher frequency doubling.
Novice: If the system can't start normally or work unsteadily after CPU overclocking, I heard that it can be solved by increasing the core voltage of CPU. Is this reasonable?
Meng: Yes. Because after CPU overclocking, power consumption will also increase. If the power supply current remains unchanged, some CPU will not work normally and stably due to insufficient power consumption. After increasing the voltage, the CPU gets more power, which makes overclocking more successful and stable.
The core voltage of CPU can be set and adjusted in BIOS (as shown in Figure 7). In general, you can choose the default status. If the system is unstable after CPU overclocking, you can add voltage to the CPU core. However, the side effects of voltage application are very great. First, the heating value of CPU will increase. Secondly, if the voltage is too high, it is easy to burn out the CPU. Therefore, we must be careful when applying voltage. Generally, it can be applied in steps of 0.025V, 0.05V or 0.1V. ..
3. Overclocking with software.
Rookie: Well, I remember now. What about overclocking through software?
Meng: As the name implies, it is overclocking through software. This kind of overclocking is relatively simple, and its characteristic is that the computer will resume the set frequency after shutdown or restart. If the novice is afraid of realizing hardware overclocking at one time, you can test the overclocking effect with software overclocking first. The most common overclocking software includes SoftFSB and software developed by various motherboard manufacturers. Their principles are similar, and they all achieve the purpose of overclocking by controlling the frequency of the clock generator.
SoftFSB is a general software (Figure 8), which can support dozens of clock generators. As long as you choose the model of the clock generator used on the motherboard, click GET FSB to get the control of the clock generator, and then you can set the overclocking through the frequency bar. After selection, press Save to let the CPU start working at the newly set frequency. However, the disadvantage of software overclocking is that when the frequency you set is unbearable for the CPU, it will cause a crash or system crash at the moment you click Save.
Take this and see the secret technique of overclocking.
1.CPU overclocking is related to the "constitution" of the CPU itself.
Many friends say that their CPU is still unstable after overclocking, which is the "physique" problem. For the same type of CPU, there are different output overruns in different cycles, which can be reflected in the processor number.
2. The CPU with low frequency doubling is so good.
As we all know, improving the external frequency of CPU is faster than improving the frequency doubling performance of CPU. If it is a CPU without frequency locking, experts will adopt the method of increasing external frequency and reducing frequency doubling to achieve better results, and draw the conclusion that the CPU with low frequency doubling has inherent advantages. For example, overclocking athletes AMD Athlon XP1700+1800+and Intel Celeron 2.0GHz.
The more advanced the manufacturing process, the better.
The more advanced the CPU, the higher the frequency when overclocking. For example, Intel's new Celeron D processor, which has won wide attention, uses 90 nm manufacturing technology and Prescott core. Some netizens have surpassed a Celeron D from 2.53GHz to 4.4GHz.
4. Temperature has a decisive influence on overclocking.
As we all know, the temperature of CPU will increase greatly after overclocking, so it is necessary to equip with a good cooling system. This refers not only to CPU fans, but also to chassis fans. In addition, it is also important to coat a thin layer of silicone grease on the CPU core, which can help the CPU to dissipate heat well.
5. Motherboard is a sharp weapon for overclocking.
A motherboard that can support overclocking well generally has the following advantages: (1) supports high external frequency. (2) Have a good power supply system. For example, a motherboard powered by three phases or a motherboard powered by a single CPU. (3) Motherboard with special protection. If the power supply can be cut off immediately when the CPU fan stops running, some motherboards call it "burning deathless technology". (4) Motherboard with special overclocking setting in 4)BIOS. (5) Excellent workmanship, preferably 6-layer PCB.
The above picture cannot be displayed. If you are interested:
Original address:/DIY/diytech/115210535.html.