What is the VGA output resolution?

The output resolution supported by the VGA cable is quite wide. The minimum resolution it can support is 320×400px @ 70 Hz / 320x480px @ 60 Hz (with a signal bandwidth of 12.6 MHz), and the maximum is 2048×1536px (QXGA) @ 85 Hz (388 MHz). However, in practical applications, images with resolutions below 1920×1080P are more stable.

Common resolution support situation
The VGA interface can support various resolutions, covering from lower to higher resolutions. In terms of lower resolutions, it can support 320×400px @ 70 Hz and 320x480px @ 60 Hz, with a corresponding signal bandwidth of 12.6 MHz. As the resolution increases, the VGA interface can also handle it. For example, it can support 1280×1024px (SXGA) @ 85 Hz at this time, with a signal bandwidth of 160 MHz; even it can support up to 2048×1536px (QXGA) @ 85 Hz, with a signal bandwidth of 388 MHz.

Limitations in high-resolution usage
Although the VGA interface theoretically supports higher resolutions, it is prone to interference in high-resolution scenarios. When the resolution is too high, the image may suffer from blurring, affecting the visual effect. This is because the VGA interface transmits analog signals, and in high-resolution scenarios, the signal is more susceptible to external factors' interference, resulting in a decline in signal quality and subsequently causing the image to become blurred.

Recommended resolution range
Generally, when the resolution is below 1920×1080P, using the VGA interface can ensure the stability of the image. Within this resolution range, the VGA interface can better transmit the signal, reducing the impact of external interference on the image, providing users with a clearer and more stable image display effect. Therefore, if the requirement for image stability is high and the device supports it, it is recommended to set the resolution to 1920×1080P or below to use the VGA interface.