To tell the truth, each has its advantages and disadvantages.
The sound quality of external sound card is better than that of internal sound card, but it takes up more space. The built-in sound card can be plugged into the motherboard to save space, but the sound quality is not as good as the external sound card.
The first is the difference in power supply. The external sound card can have independent power supply, and the internal sound card uses computer power supply. Audio-related circuits include many analog circuits, which require high electrical quality. Most of the circuits of the computer itself are digital circuits, and there is no high standard requirement for electricity, so the power supply of the computer does not need to be specially optimized for the power supply of the sound card. ?
The second is the difference in volume. The external sound card does have more space to arrange more lines and components, which is not directly related to the excellent sound, but in most cases it means better sound. More importantly, it can bring more functions and interfaces, so that the sound card has its own panel.
Finally, the difference between shielding. External sound card can better shield two kinds of interference. One is electrical interference, that is, electromagnetic interference, which is easy to understand. This sound card contains many analog circuits, which has a lot to do with it. The second is vibration. When the circuit is energized, it will produce vibration, which will affect the analog circuit, so it is necessary to give the sound card a separate large and thick shell. Because the built-in sound card is on the motherboard, it will be interfered more or less, which will reduce some sound quality.