IMPORTANT NVIDIA PETITION - ALL GEFORCE FX OWNERS PLEASE SIGN THANKS
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Half-Life 2 is ATI's game. Nvidia has Doom3 and that's where the FX cards
shine. We have known it would be this way for more than a year now. So you just now getting it? DaveL wrote in message ... http://www.petitiononline.com/nvidiafx/ |
DaveL wrote:
Half-Life 2 is ATI's game. Nvidia has Doom3 and that's where the FX cards shine. We have known it would be this way for more than a year now. So you just now getting it? DaveL wrote in message ... http://www.petitiononline.com/nvidiafx/ It's not quite that simple. About a year ago or whenever the hell it was, Valve had a "Shader Day". During this each company tried to demo their best in the current build of the Source engine. At that time, Valve had a mixed mode driver in place for FX class hardware. This used partial precision hints where needed and a modified PS2.0A path to greatly optimize the default FX performance without any image quality loss. Editors at the time commented that it ran just as fast in DX9 as an equal ATI card. This specifically concerned a 5900/U I believe. But for final release (even after the source code and E3 leaks!), Valve implemented a single PS2.0 DX9 path requiring full precision for everything. Ba-dump... FX performance goes down the ****ter and only driver optmization or application detection to reorder the instruction in the dynamic recompiler can help pull it out. This is in addition to the problems the FX has anyway with instruction order, pipeline stalls, a multitexture oriented architecture (pixel shaders are single texture), and being heavily based upon a different high level shader API, cG. |
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