When enabled, Active Signal Mode analyzes the color signals being sent to the display and adjusts them to ensure that the colors are accurate, vibrant, and well-balanced. This feature uses advanced algorithms to optimize the color gamut, brightness, and contrast of the display, resulting in a more immersive and engaging visual experience.

If you set HDR on but see "8-bit" in active signal mode, you're getting dithered HDR, not true 10-bit.

Active Signal Mode Windows | 11 _hot_

When enabled, Active Signal Mode analyzes the color signals being sent to the display and adjusts them to ensure that the colors are accurate, vibrant, and well-balanced. This feature uses advanced algorithms to optimize the color gamut, brightness, and contrast of the display, resulting in a more immersive and engaging visual experience.

If you set HDR on but see "8-bit" in active signal mode, you're getting dithered HDR, not true 10-bit.