NVIDIA Simultaneous Multi-Projection Explained

On May 6, NVIDIA revealed the first gaming GPU based on their new Pascal architecture – the NVIDIA GeForce GTX 1080. The GeForce GTX 1080 not only boasts the latest Pascal architecture, it is also fabricated on the new 16 nm FinFET process technology and uses the new GDDR5X memory.

Although we were not in Austin, Texas for the official launch, NVIDIA invited us to an exclusive tech briefing in Bangkok on May 20th. While these hardware specifications are well-known by now, this was a technical briefing that would give us greater insights into the other new technologies that are being introduced with the GeForce GTX 1080.

NVIDIA Simultaneous Multi-Projection Explained

NVIDIA brought in the big guns for the tech briefing and demonstration – Nick Stam (NVIDIA Senior Technical Marketing Director), Jeff Yen (NVIDIA Senior Technical Marketing Manager) and John Gillooly (NVIDIA Technical Marketing Manager). We will be posting a series of videos of their presentations, divided into topic-specific chunks. Today, we are going to look at the new NVIDIA Simultaneous Multi-Projection Technology works.

 

NVIDIA Simultaneous Multi-Projection Explained

In this 19 minute-long video, Nick and Jeff explains how the new NVIDIA Simultaneous Multi-Projection technology will make a huge difference for gamers with multi-monitor setups, or virtual reality headsets. Both multi-monitor and virtual reality gamers will enjoy a much wider, and more realistic field of view.

On top of that, Simultaneous Multi-Projection can deliver up to 1.5X better pixel throughput, and 2X better geometry throughput for virtual reality displays! To find out how they do it, watch this video, or read the explainer below.

 

How Simultaneous Multi-Projection Delivers Better Performance

The new Simultaneous Multi-Projection architecture of the NVIDIA Pascal-based GPUs will be able to tackle two unique performance challenges that virtual reality creates – Lens Matched Shading and Single Pass Stereo.

Lens Matched Shading improves pixel shading performance by rendering closely to the warped dimensions of VR display output. This avoids rendering many pixels that would otherwise be discarded before the image is output to the VR headset.

Single Pass Stereo turbocharges geometry performance by drawing geometry only once, and then simultaneously projecting both right-eye and left-eye views of the geometry. This effectively halves the workload of traditional VR rendering, which requires the GPU to draw geometry twice — once for the left eye and once for the right eye.

Both techniques allow developers to increase performance and visual detail of their VR applications. Combined with the performance of GTX 1080 GPUs, Simultaneous Multi-Projection delivers a dramatic 2x VR performance improvement over the GeForce GTX TITAN X.

 

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