• Use the Video and Millisecond Timer command to test the Video subsystem with the millisecond timer running.
• Use the Time Video Mode command to test the synchronization with the vertical retrace of the video display and determine it's characteristics for DMDX's use.
• Use the Sound Latency command to test the latency of the DirectSound mixers.
• Use the FreeSync command to test the adaptive sync capabilities (if present), be it FreeSync or G-Sync.
• Use the Digital Video Test command to test DirectShow, the part of DirectMedia (or DirectX) responsible for the display of .MPG, .AVI, and Quicktime file formats.
• Use the Task Priorities command modify DMDX's task priorities to help eliminate display errors.

TimeDX Index.