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To that end, ATI pledged to open the X1000 platform to developers by documenting the GPU architecture for use in data parallel processing and providing a thin layer of abstraction so GPGPU developers can get more direct access to the hardware. ATI also said it planned to "seed developers with tools and prototype applications" for X1000 development.

We haven't heard many specifics yet Nike Air Max 1 Ultra Moire Blue Navy

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ATI stakes claims on physics

One of the more surprising aspects of ATI's Radeon X1000 series launch is something we didn't get a chance to talk about in our White Nike Air Max 1 Womens

about how ATI plans to go about exposing the physics acceleration capabilities of its GPUs to developers. One obvious path forward would seem to be cooperation with physics middleware vendors like Havok, but AGEIA has already made extensive inroads into next gen games development by giving away licenses for its PhysX API. If ATI is serious about making this push, it may have to slog through an API war by pushing developers to use something other than PhysX API. We shall see.

This demonstration was more important as a statement of position and direction for ATI than anything else. NVIDIA has been rather enigmatic about any plans for physics processing, and has seemed to step out of AGEIA's way for the most part, welcoming the PhysX effort as another means of improving PC gaming. ATI is clearly ready and willing to take on AGEIA's PhysX card by using its GPUs for physics simulation, and the company believes that the more general programmability of its Shader Model 3.0 implementation in the Radeon X1000 series could make it a viable competitor there. There was talk of a CrossFire dual GPU config in a split setup, with one GPU handling graphics and the other handling physics for certain games, and somebody Air Max 1 Prm Black

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ATI practically kicked off its press event for the Radeon X1000 series with a physics demo running on a Radeon graphics card. Rich Heye, VP and GM of ATI's Desktop Business Unit, showed off a simulation of rolling ocean waves comparing physics performance on a CPU versus a GPU. The CPU based version of the demo was slow and choppy, while the Radeon churned through the simulation well enough to make the waves flow, er, fluidly. The GPU, he proclaimed, is very good for physics work, and he threw out some impressive FLOPS numbers to Nike Air Max 1 Olive Green accentuate the point. A Pentium 4 at 3GHz, he said, peaks out at 12 GFLOPS and has 5.96GB/s of memory bandwidth. By contrast, a Radeon X1800 XT can reach 83 GFLOPS and has 42GB/s of memory bandwidth.

Beyond just physics, ATI is happy to see its GPUs being used for all sorts of general purpose computation. To that end, it invited Mike Houston from Stanford to come talk about his efforts at GPGPU, or general purpose computation on graphics processing units. Houston gave a nice overview of how graphics lingo translates into general purpose computation, where textures are used as general storage and pixel shaders operate on data other than pixels. There's a PDF of his talk available online, so you can read it for yourself. Houston particularly liked the Radeon X1800's new features, including 32 bit floating point precision, long shader programs with flow control, and faster data uploads and downloads over PCI Express. He also praised the X1800's large number of available registers and its support for 512MB memory, which he said is sorely needed in GPGPU applications.

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Houston gave several examples of applications where GPUs can outshine CPUs for certain types of data parallel processing. Although the GROMACS implementation wasn't yet optimized for the Radeon X1000 series and still used Pixel Shader 2.0b, the Radeon X1800 XT was already performing between 2.5 and 3.5 times faster than a Pentium 4 3GHz processor. The GeForce 7800 GTX didn't fare so well, achieving only about half the speed of the P4 3GHz. Houston offered a laundry list of things that GPGPU developers need from graphics chip makers, including better information about how to program the GPU and more direct access to the hardware.

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initial review of the graphics cards: ATI's eagerness to talk about using its GPUs for non graphics applications.

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present even suggested the possibility of a third GPU on a PCI card dedicated to physics processing. The folks from ATI seemed to like this suggestion.

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