Tag Archives: mGPU

AMD Retires CrossFire & Limits mGPU Capability

When AMD announced the ability to run two Radeon RX Vega cards simultaneously, they conspicuously called it mGPU (short for multiple GPU) instead of the far more familiar CrossFire. That’s because they are retiring the CrossFire brand in favour of the generic mGPU moniker. They also limited the mGPU capability. Find out why!

 

End of the road for AMD CrossFire

The first AMD Polaris-based graphics card, the AMD Radeon RX 480, was showcased in Computex 2016 with Raja Koduri showing off its CrossFire performance in Ashes of the Singularity. But when AMD released the Radeon RX Vega family, they did not mention any CrossFire support.

In fact, the AMD Radeon RX Vega graphics cards was only capable of running as single cards until the release of Radeon Software 17.9.2. It also represented the end of the road for AMD CrossFire. With this release, AMD officially abandoned it for mGPU.

Why? Here is AMD’s response when they were asked that very question by Brad Chacos of PCWorld :

CrossFire isn’t mentioned because it technically refers to DX11 applications.

In DirectX 12, we reference multi-GPU as applications must support mGPU, whereas AMD has to create the profiles for DX11.

We’ve accordingly moved away from using the CrossFire tag for multi-GPU gaming.

This is a surprising turn of event because the CrossFire brand goes all the way back to 2005. Almost 12 years to the day, as a matter of fact. That’s a lot of marketing history for AMD to throw away. But throw it all away, they did.

Nothing has changed though. They just decided to call the ability to use multiple graphics cards as mGPU, instead of CrossFire. In other words – this is a branding decision.

AMD will continue to use CrossFire for current and future DirectX 11 profiles, but refer to mGPU for DirectX 12 titles.

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Limited mGPU Capability

AMD is also limiting the mGPU support to just two graphics cards. The 4-way mGPU capabilities that top-of-the-line Radeon cards used to support have been dropped. The AMD Radeon RX Vega family are therefore limited to two cards in mGPU mode :

Gamers can pair two Radeon RX Vega 56 GPUs or two Radeon RX Vega 64 GPUs

This move was not surprising. Even NVIDIA abandoned three or four card configurations with the GeForce GTX 10 series last year. With fewer games supporting multi GPUs and interest in power efficiency burgeoning, the days of 3-way or 4-way multi GPUs are over.

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Deus Ex Mankind Divided DirectX12 Patch Released

Eidos-Montreal and Square Enix have announced their official Deus Ex Mankind Divided DirectX 12 patch, scaling performance to a whole new level with DirectX 12 multi-GPU and frame pacing support on Radeon graphics.

This Deus Ex Mankind Divided DirectX 12 patch enables advanced DirectX 12 features and enhanced performance with support for :

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Asynchronous shaders

  • Asynchronous Compute Engines in AMD’s GCN and Polaris architectures can submit commands without waiting for other tasks to complete.
  • Delivers vastly improved GPU efficiency, boosting graphics processing performance, reducing latency and enabling consistent frame rates.

Enhanced multi-GPU experience

  • AMD’s GCN and Polaris architectures lead with greater performance and scalability in multi-GPU DirectX 12.
  • Gamers will benefit from up to 100 percent faster performance using Radeon Software Crimson Edition driver 16.10.2 running Deus Ex: Mankind Divided on 8GB Radeon RX 480 multi-GPU1 in DirectX 12.
  • The 4GB Radeon RX 470 also offers up to 100 percent faster multi-GPU performance in DirectX 12 in Deus Ex than with the 4GB Radeon RX 470 single-GPU.2

DirectX 12 Frame Pacing

  • AMD’s support of multi-GPU DirectX 12 Frame Pacing enables smooth gameplay on Radeon Graphics by evenly distributing frame times and providing them at a more consistent rate, delivering an exceptional gaming experience.

 

Deus EX Mankind Divided

Deus Ex Mankind Divided is the sequel to the critically acclaimed Deus Ex Human Revolution and builds on the franchise’s trademark choice and consequence, plus action-RPG based gameplay, to create both a memorable and highly immersive experience.

Players will once again take on the role of Adam Jensen, now an experienced covert agent, and will gain access to his new arsenal of customizable state-of-the-art weapons and augmentations. With time working against him, Adam must choose the right approach, along with who to trust, in order to unravel a vast worldwide conspiracy.

 

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AMD Doubles Down On mGPU Frame Pacing

Adding to Radeon Software Crimson Edition’s enhancements for DirectX 9, DirectX 10, and DirectX 11, Radeon Software 16.9.1 enables multi-GPU frame pacing support to DirectX12 on all GCN-enabled GPUs and AMD A8 APUs or higher with GCN.

Frame pacing delivers consistency by increasing smoothness in gameplay. In multi-GPU (mGPU) configurations, GPUs render alternating frames and push each frame to your screen. Each render can be created at various speeds causing differences in frame time. With frame pacing enabled, frames are distributed evenly, i.e. with less variance between frames, creating liquid smooth gameplay. For more details, please watch the following video:

 

Radeon Tech Talk: DirectX 12 mGPU Frame Pacing

A number of games currently take advantage of frame pacing in DirectX 12. Total War – Warhammer, Rise of the Tomb Raider and the 3DMark Time Spy benchmark also show smoother run-throughs.

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Let’s look at the some real-life scenarios:

 

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