DirectX 12 Will Allow Multi-GPU Between GeForce And Radeon

Thu, Feb 26, 2015

Computers, Games, News

DirectX 12 Will Allow Multi-GPU Between GeForce And Radeon

Tom’s Hardware  early information about some of the details regarding DirectX 12, and what follows will surprise you.

According to an unnamed source who spoke to them new DirectX 12 will allegedly have Explicit Asynchronous Multi-GPU Capabilities

The new API will work much differently from older APIs, and it’s common knowledge by now that it will be “closer to the hardware” than older APIs, similar to AMD’s Mantle. This will bring massive improvements in framerates and latency, but that’s not all that DirectX 12 has up its sleeve.
 DirectX 12
One of the big things that we will be seeing is DirectX 12’s Explicit Asynchronous Multi-GPU capabilities. 

According to the source, the API will be able to combine different graphics resources and pool all those resources together. Rather than having multiple GPUs rendering an Alternate Frame (AFR) each, there is a new method called Split Frame Rendering (SFR) that is being introduced. Developers will be able to automatically, or manually, divide texture and geometry data between GPUs that will be able to work together on each frame and be designated a separate portion of the screen for each GPU. Unlike AFR, that requires both cards to have all of the data in their frame buffers and leaving the user to have a 4GB frame buffer even though there are two cards with 4GB of memory each.

This will, says the source, significantly reduce latency.

Yet SFR isn’t new, as AMD’s Mantle API supports it and applications out there that do as well (see how Mantle performs against DirectX 11). What is surprising is that the source went on to say that DirectX 12 will support all of this across different GPU architecures allowing AMD Radeon and Nvidia GeForce GPUs to work together to render the same game.

However, while this sounds great, it will still be up to developers to make use of, and utilize, Explicit Asynchronous Multi-GPU Capabilities for their games and software.

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