Nvidia shows off multi-GPU notebooks

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    Nvidia's new GTxx series, unveiled last week, is an attempt by the company to significantly boost the graphical capabilities of notebooks and laptops. ZDNet UK visited a product demonstration of the chip in London on Friday.

    The GTX 480M graphical processing unit (pictured) is the most powerful chip within the range. The chip, like all within the series, supports DirectX 11, the latest version of Microsoft's collection of common application programming interfaces for visual applications. The GTX 480M supports PhysX, the Nvidia-developed technology that increases the fidelity and detailing of physical simulations. The chip also supports 3D gaming and display, GPU-browser accelleration for modern browsers including Chrome 6 and Internet Explorer 9 (IE9), and speeds the rendering of pictures and HD video.

    GTxx discrete graphical processing units (GPUs) use Nvidia's Optimus technology, which turns the on-chip integrated graphical processor into a display controller for a separate, off-chip and more powerful dedicated GPU.

    A software layer with profiles of applications switches the chip on when the notebook when needed; for example, when editing high definition video or rendering large images.

    The output of the GPU is fed through the notebook's integrated graphics processor (IGP) and outputted to the display, with the IGP resuming control when the period of high use has ended.

    The technology is only optimised for Windows 7. Nvidia said it had not found another operating system that can support the technology required for running multiple graphical processing unit drivers in parallel, as a driver is required in this case both for the IGP and for the discrete GPU.

    Caption by: Jack Clark

  • nvidiagpu1.jpg

    The discrete GTxx GPU product range can render images up to five times faster than notebooks without the GPU, according to Nvidia. Here, two notebooks with similar specifications compete to render an image.

    The notebook on the left, which has an Intel quad-core i5 processor at 2.27GHz and 4GB of RAM, rendered the image in around 10 seconds.  The notebook on the right, which has the GPU a quad-core i5 at 2.53GHz and 6GB of RAM, rendered the image in approximately two seconds. Nvidia claims that notebooks with the GPU will generally be five times faster than any device with an integrated GPU.

    The chip's performance gains when rendering images, editing video or boosting GPU-compatible web browsers make it relevant to web developers and businesses which use high-resolution images and video.

    Caption by: Jack Clark

  • nvidiagpu2.jpg

    Nvidia ran two versions of popular PC game Starcraft 2 on two laptops to demonstrate the chip's performance on intense, graphical applications. All graphical settings were running at the highest possible resolution. One laptop had the processor, and one had an integrated graphics processor. Here, Igor Stanek, European product PR manager, shows that the non-GPU laptop struggled to cope, running the game at 7 frames per second.

    Caption by: Jack Clark

  • nvidiagpu3.jpg

    An integrated graphics laptop, left, and an Nvidia GPU laptop, right, demonstrate Starcraft 2. The laptop with the GT series GPU inside is demonstrating a consistent frame rate of 50 frames per second, while the laptop on the left is running at between 6 and 7 frames per second.

    Six major laptop suppliers - Acer, Asus, Dell, Lenovo, Samsung and Toshiba - are onboard to support the 400 Series of GPUs. Nvidia said that HP was not going to support the GTxx series, but declined to comment further.

    Caption by: Jack Clark

  • nvidiagpu4.jpg

    The GTxx series all support 3D technology, with some manufacturers fusing the new GPU with specially designed 3D-capable laptops to serve 3D content to users.

    The GPUs are compatible with Nvidia's 3D Vision software, which can convert over 400 computer games into stereoscopic 3D on notebooks. Here, you can see a laptop with the GT 425m model displaying the game Trine in 3D.

    Caption by: Jack Clark

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Nvidia has demonstrated its new range of discrete GPUs for notebooks, which allows a notebook to operate two graphical processing units at once

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Nvidia's new GTxx series, unveiled last week, is an attempt by the company to significantly boost the graphical capabilities of notebooks and laptops. ZDNet UK visited a product demonstration of the chip in London on Friday.

The GTX 480M graphical processing unit (pictured) is the most powerful chip within the range. The chip, like all within the series, supports DirectX 11, the latest version of Microsoft's collection of common application programming interfaces for visual applications. The GTX 480M supports PhysX, the Nvidia-developed technology that increases the fidelity and detailing of physical simulations. The chip also supports 3D gaming and display, GPU-browser accelleration for modern browsers including Chrome 6 and Internet Explorer 9 (IE9), and speeds the rendering of pictures and HD video.

GTxx discrete graphical processing units (GPUs) use Nvidia's Optimus technology, which turns the on-chip integrated graphical processor into a display controller for a separate, off-chip and more powerful dedicated GPU.

A software layer with profiles of applications switches the chip on when the notebook when needed; for example, when editing high definition video or rendering large images.

The output of the GPU is fed through the notebook's integrated graphics processor (IGP) and outputted to the display, with the IGP resuming control when the period of high use has ended.

The technology is only optimised for Windows 7. Nvidia said it had not found another operating system that can support the technology required for running multiple graphical processing unit drivers in parallel, as a driver is required in this case both for the IGP and for the discrete GPU.

Caption by: Jack Clark

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