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DOOM 3 & DX9

With all the discussion lately about how Half-Life 2 will run on ATI hardware compared with NVIDIA accelerators, BonusWeb.cz shot off an email to id Software's John Carmack to ask how DOOM 3 and other games are likely to be impacted by the difference between the two graphics platforms running DirectX 9. Here's how he responded:

Unfortunately, it will probably be representative of most DX9 games. Doom has a custom back end that uses the lower precisions on the GF-FX, but when you run it with standard fragment programs just like ATI, it is a lot slower. The precision doesn't really matter to Doom, but that won't be a reasonable option in future games designed around DX9 level hardware as a minimum spec.

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113. Re: SOUR GRAPES Sep 21, 2003, 08:27 zamfear
 
Doom is based on the DX7 specifications, the GF5900 is the ultimate DX7 card, thats why it runs Doom3 faster. This isn't a joke. Carmack isn't holding back the Radeons performance. You can get educated at www.beyond3d.com
Just search through thier forums.

 
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