The so-called CPU overclocking is to increase the CPU's FSB or frequency multiplier, thereby increasing the CPU's operating frequency. When the CPU overclocking causes the PCI bus frequency to exceed the rated frequency of the AC'97 sound card, the sound card may experience popping or silent failures. How to solve this problem if you encounter it? Let's take a look.

Note: The AC'97 sound card is designed based on the standard PCI bus, and its stable operating frequency is 33 MHz. When the CPU FSB exceeds 75MHz, the PCI bus frequency reaches 37.5 MHz, which has exceeded the AC'97 rated frequency, thus causing noise. When the FSB exceeds 80MHz, the system automatically shuts down the AC'97 sound card on the motherboard for stability, causing a failure to produce sound.

Fault phenomenon:

A computer uses a Celeron 667MHz CPU, an Intel 815E motherboard, and an integrated AC'97 sound card. The CPU was recently overclocked. When the FSB was exceeded to 75MHz, the sound card kept making popping noises. When the FSB was exceeded to 80MHz, it was found that the sound card was not working. speak out.

Treatment method:

1. If the CPU can be overclocked to 100Mz FSB, then the motherboard will automatically use the 1/3 frequency division, so the PCI bus frequency will automatically return to 33Mz, and the fault will disappear automatically;

2. If the CPU cannot exceed the 100MHz FSB, you can only replace it with a good quality sound card, but this is also very risky. The best way is not to use non-standard FSB and adjust the CPU FSB back to 66 MHz.

PS: If the motherboard cannot lock the AGP/PCI frequency, most sound cards may have such a problem when the CPU FSB is at a non-standard FSB.

The above is the solution to the popping/silent failure of the sound card caused by CPU overclocking. For novices, the editor does not recommend CPU overclocking, because the CPU is the core of the computer, and once the operation is performed incorrectly, it will affect the performance of the system.