Synchronizing video outputs towards a single display frequency

A system comprising:

• a display system for displaying a synchronized composite image thereon at a single display frequency;
• a plurality of independent video cards each configured for supporting on-the-fly image refresh rate adaptation based on responsiveness from a corresponding image generator process;
• and
• a plurality of image generator processors each configured for driving one or more of the plurality of independent video cards and having access to a shared reference signal;
• wherein each one of the plurality of image generator processors is configured for artificially affecting, in real-time, image generation rendering speed during a next frame generation processing to trigger the on-the-fly image refresh rate adaptation by the one image generator processor's video card for proactively scheduling refresh of an image corresponding to the next frame by the one image generator processor's video card, thereby aligning the refresh of the image to the shared reference signal while avoiding manipulation of memory registers of the one image generator processor's video card by the one image generator processor;
• wherein the composite image comprises each of the images corresponding to the next frames from each one of the plurality of image generator processors.