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Carmack on New Doom platforms

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Taken from: http://www.macledge.com/news/item.php?id=1975

Recently id Software's co-founder and lead developer John Carmack confirmed the authenticity of recent remarks regarding the megahertz gap between The Power PC and Wintel machines. The comments posted on Technology news and message board site Slashdot.org, which caused quite a raucous among Mac users. Especially since the comments run contrary to Apple's "system performance over megahertz" philosophy and the Mac vs. PC Photoshop speed test during every MacWorld keynote address.

Here's a clip from MacWEEK.com's article:
Some users questioned the authenticity of Carmack's Slashdot remarks, but he confirmed over the weekend that he did indeed post the comments.

"The position hasn't changed in years--PPC CPUs are as good as, or slightly better than, x86 on a clock for clock basis, but they can't overcome the large megahertz gap that exists," he said. "AltiVec has some wins, but it won't make any significant difference unless the performance is extremely focused in a small area, and the balance of computation and bandwidth is just right."

During the Tokyo keynote, Carmack previewed an engine that Id is using to develop the next game in its Doom series. The demonstration highlighted the new effects enabled by NVIDIA's latest graphics chip, the GeForce3, which was officially unveiled during the show. It's expected to ship in March as a $350 build-to-order option and in April as a $600 stand-alone product.

NVIDIA is touting the GeForce3 as offering a high degree of flexibility for developers who want complete control over the way that geometry and pixel-shading information is calculated. The chip's new memory management architecture promises big performance gains, as well, NVIDIA said. Carmack said that such advances will make it harder for developers to take advantage of CPU extensions such as the G4's Velocity Engine (Apple's brand name for Motorola's AltiVec).

"Now that 3-D cards are doing all the rasterization and geometry work, the traditional hot spots in games are gone, resulting in a much more diffuse profile that is harder to spot optimize," he said.

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Guest fragg

Excellently-written post, with excellent info. Thanks.

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