Nvidia works on a multigpu technology called cfr

It seems that Nvidia is working on a new graphics technology called CFR - Checkered Frame Rendering.

Nvidia's CFR (Checkered Frame Rendering) would improve multi-GPU graphical rendering

A 3DCenter forum user has noticed an added entry to the drivers for Muli-GPU rendering, the technique is called CFR and it basically cuts a frame into many small pieces, so that GPUs can render them in parallel.

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Basically what this technique would do is break the images into small blocks for the GPUs to render based on an algorithm or simply FIFO, 'first-in', 'fist-out' which could increase scaling performance and minimize screen-tearing image defects. The base is, of course, an existing technique applied in many solutions. NVIDIA, however, wants to use it for multi-GPU rendering.

In CFR, the frame is divided into small square tiles, like a chessboard. Odd numbered tiles are rendered by one GPU and even tiles by the other. Unlike AFR (alternate frame rendering), in which the dedicated memory of each GPU has a copy of all the resources needed to render the frame, methods such as CFR and SFR (split frame rendering) optimize resource allocation.

This would show that Nvidia has not thrown in the towel with MultiGPU technology, which coincide with previous rumors of the new generation called Hopper.

CFR technology, as revealed, would only be compatible with DirectX in all its variants (DX10, DX11 and DX12), OpenGL and Vulkan would be out of the equation, for now. Furthermore, it would only be used by Turing graphics cards and the next new generation Ampere GPUs, since it requires NVLink. We will keep you informed.

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