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GeForce 7800 GTX Sets Gaming Speed Records
Eric Dahl
Wed Jun 22, 9:00 AM ET
Packed with just over 300 million transistors, NVidia's latest high-end graphics chip, the GeForce 7800 GTX, is one of the most complex processors ever designed. And our tests of a reference board built around the new chip indicate that it's the fastest graphics board we've ever seen.
The GeForce 7800 GTX launches today; and NVidia expects boards to ship now from board partners such as Asus and Chaintek at a retail price of around $599. The reference board we tested was a single-slot PCI- Express board equipped with 256MB of 600-MHz DDR3 memory and dual DVI outputs.
Technology Boost
Running at 430 MHz, the new chip clocked a bit slower than the GeForce 6800 Ultra--NVidia's previous high-end graphics chip. NVidia boosted the new chip's processing power in a couple of ways. First, NVidia's chip designers added more pipelines for processing pixel and vertex shaders--short programs that the graphics chip runs to create realistic 3D graphics.
The 7800 chip has 8 vertex shader pipelines and 24 pixel shader pipes, whereas the chip in 6800 Ultra boards contains 6 vertex pipes and 16 pixel pipes. The extra pipelines account for much of the new chip's high transistor count.

Yahoo News/PC World
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