Split frame rendering

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Scheme of operation

Split Frame Rendering (SFR) ( called Scissor Mode with "Load Balancing" by ATI ) is a rendering mode that is used in multi-GPU processes .

technology

In contrast to the simpler AFR mode , which alternates rendering, the SFR mode splits each frame and both cards calculate the same image at the same time.

With the simpler variant of SFR, both cards each render half of the image.

Example:

  • Card 1 renders the top half of an image
  • Card 2 renders the bottom half of an image

In the complicated SFR variant with load balancing (also called "Scissor Mode"), the work is divided up depending on the complexity of the scene to be rendered.

For example, if half of a scene consists of sky with little demand on computing power:

  • Card 1 renders the top two-thirds of an image
  • Card 2 renders the bottom third of an image.

This division is dynamically adjusted so that both cards are loaded equally in order to achieve the best possible performance.

application

SFR is used in the following multi-GPU technologies: