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Exclusive Interview: Nvidia's Ian Buck Talks GPGPU

Exclusive Interview: Nvidia's Ian Buck Talks GPGPU
With Snow Leopard and Windows 7 both offering GPGPU capabilities, we wanted to talk to Nvidia's Ian Buck. Not only is he one of the fathers of Brook, the programming language ultimately adopted by AMD/ATI, but the head of Nvidia's CUDA group as well. Read More

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IBM slows down light on a silicon chip

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2:27 PM - November 3, 2005 by The Editors of Tom's Hardware

IBM researchers have created a tiny device that could lead to the use of light in place of electricity in the connection of electronic components, the company announced today. This technology ha sthe potential to bring "vast improvements in the performance of computers and other electronic systems," IBM claims.

The firm's scientists were able to slow light down to less than 1/300th of its usual speed (down to about 620 miles per second) by directing it down a carefully designed channel of perforated silicon called a "photonic crystal waveguide." The device allows the light's speed to be varied over a wide range by applying an electrical voltage to the waveguide, IBM said. While slowing down light under laboratory conditions is nothing new, the company claimsthat actively controlling the light's speed on a silicon chip and using standard silicon with standard micro- and nanoelectronic fabrication technology, is a first.

The device's small size, use of standard semiconductor materials, and ability to more closely control this "slow light" could make the technology useful for building ultra-compact optical communications circuits that are practical for integration into computer systems.

Source : Tom's Hardware US

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