What is overclocking and how to overclock the CPU?

A computer overclock increases the operating frequency of CPU, video card, and other hardware manually so that they can work stably at a higher rate than its rated frequency. Taking intel p4c 2.4ghz CPU as an example, its rated operating frequency is 2.4 GHz. If the operating frequency is increased to 2.6 GHz, the system can still run stably, and the overclocking is successful.

The main purpose of CPU overclocking is to increase the operating frequency of the CPU, that is, the clock speed of the CPU. The CPU clock speed is the product of the outer frequency and the multiplier. For example, if the external frequency of a CPU is 100 MHz and the frequency doubling is 8.5, the clock speed is calculated as follows: External frequency × frequency doubling = 850 MHz × 8. 5 = MHz.

To increase the CPU clock speed, you can change the frequency doubling or out-frequency of the CPU. However, if you are using an Intel CPU, you can ignore the frequency doubling because intelcpu uses a special manufacturing process to prevent frequency doubling modification. AMD's CPU can modify the frequency doubling, but modifying the frequency doubling improves the CPU performance as well as the external frequency.

The external frequency speed is usually closely related to the speed of the front-end bus and memory. Therefore, when you increase the CPU external frequency, the performance of the CPU, system, and memory is also improved.

There are two main ways to overclock the CPU:

One is hardware settings, and the other is software settings. Hardware settings are commonly used, and they are divided into Jumper settings and bios settings.

1. Patch Cord overclocking
Most early mainboards used jumpers or DIP switches for overclocking. In the vicinity of these jumpers and DIP switches, some forms are often printed on the motherboard, recording the functions defined by the Jumper and dip switch combinations. When the instance is shut down, you can set it according to the frequency in the table. After the computer is restarted, if the computer is started normally and runs stably, it indicates that the super frequency is successful.
For example, an Intel 845d chipset motherboard used in concert with sayang 1.7ghz uses jumper overclocking. Below the Inductance Coil, we can see the Jumper description table. When the jumper is set to 1-2 mode, the external frequency is 100 MHz, but changed to 2-3 mode, the external frequency is increased to 133 MHz. However, the default external frequency of SAI Yang 1.7ghz is 100 MHz. As long as we increase the external frequency to 133 MHz, the original sai Yang 1.7ghz will overclock to 2 GHz, isn't it easy :).

The other is the via kt266 chipset motherboard used with amd cpu. The DIP switch is used to set the frequency doubling of the CPU. Most amd do not lock the frequency doubling, so you can modify the frequency doubling to overspeed the frequency. This is a five-group dip switch. Different disconnections of each serial number switch can be combined to form more than 10 modes. The description table is printed on the top right of the dip switch, indicating that the dip switch has different frequency changes under different combinations.

For example, if we want to overclock an AMD 1800 + instance, we first need to know that the frequency of athlon XP 1800 + is equivalent to the frequency of 133mhz external frequency X 11. 5. As long as we increase the frequency to 12.5, the CPU clock speed will become 133mhz × 12. 5 ≈ 1.6 GHz, equivalent to athlon XP 2000 +. If we increase the frequency to 13.5, the CPU clock speed will become 1.8 GHz, and the athlon XP 1800 + overclock will become athlon xp2200 +. The simple operation will greatly improve the performance, interesting.

2. BIOS overclock settings
Currently, the mainstream motherboard basically gives up the Jumper settings and dip switch settings to change the CPU multiplier or external frequency, but uses more convenient BIOS settings.

For example, the softmenu III of the upgrade (abit) and the powerbios of the upgrade positive (epox) all belong to the BIOS overclock mode. In the CPU parameter settings, you can set the CPU frequency doubling and external frequency. If the computer cannot be started normally after the clock is over, the computer will automatically return to the default CPU working status after shutting down and holding down the ins or home key and restarting the computer, so it is better to overclock in BIOS.

Here we will use the combination of the nf7 motherboard and the athlon XP 1800 + CPU to implement this overclocking practice. There are two main brands of BIOS on the market: Phoenix-Award bios and AMI bios. Here we take Award bios as an example.

Start the computer and press del to go To the BIOS settings page of the motherboard. Select soft menu III setup from the bios, which is the softmenu overclock function of the Technical Board.

After entering this function, we can see that the system automatically recognizes the CPU as 1800 +. Press enter here to change the default recognized model to user define mode. After the manual mode is set, the unselectable CPU external frequency and frequency doubling of the original gray mode are now available.

If you need to use the extra frequency to overclock, press enter at external clock: 133mhz. There are many external frequencies available for adjustment. You can adjust them to a MHz or higher frequency option. Increasing the external frequency will increase the system bus frequency and affect the stability of other devices. Therefore, the PCI frequency should be locked.

One of the multiplier factors is to adjust the CPU multiplier. Press enter to enter the option area. You can select a multiplier based on the actual CPU usage, for example, a multiplier of 12.5, 13.5, or higher.

Cainiao?

A Meng: Yes. Because the CPU overfrequency increases the power consumption. If the supply current remains unchanged, some CPUs cannot work properly and stably due to insufficient power consumption. After the voltage is increased, the CPU gets more power, making the overclocking easier to succeed and stabilize.

You can set and adjust the CPU core voltage (7) in the BIOS ). Under normal circumstances, you can select the default status. If the system is unstable after the CPU overclock, you can add the CPU core voltage. However, the side effects of voltage addition are very large. First, the CPU heat will increase, and then the voltage will be too high to burn out the CPU. Therefore, you must be careful when adding voltage, generally, you can step up with 0.025 V, 0.05v, or 0.1v.

3. Use software to achieve overclocking
As the name suggests, it is through software to overclock. This kind of overclocking is simpler. It is characteristic that the set frequency will be restored after the computer is shut down or restarted. If the cainiao does not dare to set the overclocking at one time, they can first use the software overclocking to test the overclocking effect. The most common overclocking software includes softfsb and software developed by various motherboard manufacturers. They all work in the same way. They all achieve the purpose of overclock by controlling the frequency of the clock generator.

Softfsb is a common software that supports dozens of clock generators. After selecting the clock generator model used on the motherboard, click get FSB to obtain control of the clock generator. Then, you can use the frequency lever to set the overclock, after the selection, press save to let the CPU start to work at the new set frequency. However, the disadvantage of software overclock is that when you set the frequency to make the CPU unable to afford, the flash you click to save will lead to a crash or system crash.

CPU overclocking tips:
1. CPU overclocking is related to the CPU's "Physical Fitness"
Many friends say that their CPU pressure is unstable after the superfrequency, which is a physical issue. For CPUs of the same type that can be generated in different cycles, these features can be reflected in the processor number.

2. High CPU performance with Low Frequency Doubling
We all know that it is faster to increase the external frequency of the CPU than to increase the second frequency of the CPU. If there is no lock on the second frequency of the CPU, the experts will use the method to increase the external frequency and reduce the second frequency to achieve better results, it is concluded that the CPU with low frequency doubling has inherent advantages. For example, the super boot will amd athlon xp1700 +/1800 + and Intel celon 2.0ghz.

3. the more advanced the production process, the better.
The more advanced the production process, the more advanced the CPU can achieve a higher frequency in overclock. For example, Intel has won widespread attention for its new intel celeon D processor, which adopts a 90-nanometer manufacturing process and the Prescott core. Some netizens have already pushed a 4.4 GHz celon d to GHz.

4. The temperature has a decisive influence on the Super frequency.
We all know that the CPU temperature will be greatly improved after the Super frequency, and a good heat dissipation system is required. This not only refers to the CPU fan, but also the chassis fan. In addition, it is also important to apply a thin layer of silicon grease to the CPU core, which can help the CPU to heat well.

5. the motherboard is a powerful tool for overclock
A motherboard that supports high-frequency generally has the following advantages: (1) high-frequency external support. (2) Good power supply system. For example, a three-phase power supply motherboard or a single CPU supply motherboard. (3) motherboard with special protection. For example, when the CPU fan is stopped, the power supply can be immediately cut off, and some boards call it the "Burning Technology ". (4) motherboard With special overclocking settings in BIOS. (5) Excellent workmanship, preferably with 6-layer PCB.