High Dynamic Range is a relatively new display concept, only implemented in the latest GPUs. It refers to the range oflighting in which the detail of an image is preserved. Normally, visual elements that are too dark or too bright, for example areas that are overshadowed, are not displayed with the same amount of detail as well-lit areas.

Doing so saves resources since in any case the detail in these areas are not noticeable to the eye. But in HDR mode, even these details become noticeable. Rendering in HDR requires higher computational power, which has become possible with the latest graphics cards.