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Originally Posted by LoganSnake
After watching Microsoft shooting themselves in both feet on MTV, I got pretty low expectations for the 360. Especially with those HORRIBLE Perfect Dark 0 screenshots on 1UP. That game is supposed to be a launch title? Laughable.
The only game that looks "next gen" is Ghost Recon. You can find some screens online. It will take a lot of pretty videos to impress me now.
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Are you aware that those screens of PD0 were of the game running on ALPHA dev. kits? It was only using 2 of the 3 CPUs, and a regular ATI X800/X850 series of graphics card (Where as the final GPU for the Xbox 360 will be more powerful than ATI's current top-of-the-line graphics card, the X850.)
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Xbox 360's GPU is based on ATI's next-generation graphics chip, putting it at least one generation beyond its current X850 card for PCs.
The GPU runs at 500MHz and features 48 shader units, which are not directly comparable to traditional pixel pipelines. Rather than having pixel and vertex shaders work as separated elements like on current PC video cards, each shader unit can perform either pixel or vertex shading as necessary. This allows the system to move performance to where it's needed, either for more effects or more raw geometry rendering.
Basically, it's fast as all hell.
The Xbox 360 make's use of a shared memory architecture. That means that the system's 512MB of RAM will be used for graphics and texture memory as well as things like sound, animation source and of course, the actual game code itself.
While the majority of the graphics data will be housed in the shared system RAM, like textures and the like, the video framebuffer will use NEC's dedicated embedded DRAM technology. Long story short, by embedding the framebuffer RAM directly onto the graphics chip, Xbox 360 will be able to perform post-processing features much more quickly, like anti-aliasing and motion blur. The Xbox 360 has 10MB of embedded DRAM.
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Quoted from
http://xbox360.ign.com/articles/608/608394p3.html