lundi 29 juillet 2013

Nvidia demonstrates incredible next-gen mobile graphics system

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By July 25, 2013

Nvidia's Ira demo running on the Logan mobile chip
Nvidia's Ira demo running on the Logan mobile chipWith its new Project Logan mobile system-on-chip, Nvidia has not so much raised the bar as blown the roof off expectations of computer and game graphics on mobile devices. In an impressive display of Logan's "oomph," the company has shown it running Ira, an incredibly detailed and effects-heavy demo of a human head animated in real time. The demo was itself unveiled in recent months, and previously shown running on Nvidia's super-heavyweight GeForce Titan graphics card.
Running on Nvidia's reference tablet platform, Ira runs with certain compromises. For example, though Logan is able to render Ira in full high definition, Titan can do so in 4K. Nevertheless, Nvidia claims that most aspects of the demo are the same, with HDR lighting, FXAA anti-aliasing, bloom, tone mapping and deep tissue scattering all present and correct. With the last effect turned off, the difference is palpable:
Logan running the Ira demo with deep tissue scattering turned on (left) and off (right)
Logan running the Ira demo with deep tissue scattering turned on (left) and off (right)
Perhaps most impressively, whereas Ira running on Titan consumes a fully 250 W of power, Logan handles it with between 2 and 3-W consumption. Like Titan, Logan is based on Kepler architecture, and Nvidia claims that this will make it straightforward for games developers to produce games for desktop first, then port to mobile systems.
Nvidia has also shown Logan running the Island demo, which makes use of Open GL 4.3 tessellation to render scenes with much greater efficiency, and hence detail, than pre-generated graphics which require all possible view points to be calculated.
Nvidia unveiled Logan at SIGGRAPH 2013. You can see the Ira and Island demos below.

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