Thus, if a game played at 30 fps on the Xbox 360, choosing Performance mode has no effect on performance but it reduces resolution from native 4K to 720p. Performance mode involves a serious downgrade in visual quality because it sacrifices 4K and displays the game at its original 720p resolution. However, if a game maintained a solid 30 fps on the Xbox 360, Performance mode does nothing for performance because the original code hasn’t been changed to remove the 30 fps cap. If a game failed to reach this cap on the Xbox 360, the Performance mode will produce solid 30 fps gameplay because the One X is a much more powerful console. Many Xbox 360 games were capped at 30 fps. This means that choosing Performance mode may not increase performance although it will definitely produce lower quality visuals. The game’s original code is not changed it’s exactly the same game displayed at a higher resolution.

These games are enhanced to run at native 4K (3840 x 2160) by collapsing a 3 x 3 grid of 720p renders into a full 4K image.

Xbox 360 games run at native 720p (1280 x 720) resolution.

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