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Nvidia unveils SLi-capable GeForce Go 7800GTX

Leaked slides, spec confirmed

Nvidia unveiled its first GeForce 7 series mobile graphics chip last night, as expected.

The GeForce Go 7800GTX incorporates the latest generation of Nvidia's pixel processing and video enhancement technologies, CineFX 4.0 and PureVideo 2.0. Intellisample 4.0 and UltraShadow II are in the mix too.

The 7800GTX can process up to 24 pixels per tick of the chip's clock, yielding a fill rate of 10.32bn pixels per second. Its geometry engines can process 860m vertices each second. Nvidia claims it "delivers up to 2x the shading power of previous generation products". It also said the part is the first mobile GPU to support transparency super-sampling and multi-sampling, enhancing the look of objects modeled in alpha-tested textures, such as chain-link fences, grass and trees.

The core connects to video memory across a 256-bit bus. Nvidia quotes a memory bandwidth of 38.4GBps, indicating the memory is clocked to 600MHz (1.2GHz effective).

Interestingly, the 7800GTX is compatible with Nvidia's SLi technology, according to the chip maker's website. That suggests notebook makers will soon be able to offer mobile gaming systems containing two graphics cores.

The part also support PowerMizer 6.0, the latest version of Nvidia's power management system, which allows the faster, more feature-filled chip to operate within the same power envelope as its predecessor, the GeForce Go 6800.

The new GPU is immediately available in notebooks from Sager, Falcon Northwest, Voodoo, Eurocom, ABS, Hypersonic, Evesham and ProStart. ®

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