Game Unplayable

[335th_GRAthos]

Originally Posted by KG26_Alpha

When I was testing a 9800GTX+ I got much better fps results with DX9 settings than DX10 in CoD

My point was to the OP that he should run CoD under XP with DX9

Your suggestion of getting Win 7 wont solve the poor performance of the GPU he has.

That is good to know Alpha, did you benchmark the 9800GTX with WinXP+DX9 and Win7+DX10 ?
It would b bad news to all people who hope to upgrade to Win7 in order to solve the performance issues with WinXP.
I presume it is because the 9800GTX runs DX10 but NOT DX10.1
The older NVIDIA cards were running a DX10 version with shader model 4.0 and later generations were running DX10.1 with shader version 4.1

I do not know for sure what shader model CoD needs. According to an interview in pcgameshardware Oleg Maddox gave (11thMarch), CoD uses all DX10 and DX10.1 features.
http://www.pcgameshardware.de/aid,81...mulation/News/
If this is true then the GTX9800 can handle the shader model 4.0 but not the shader model 4.1 features CoD has in DX10 and this makes it slower in DX10 mode.


Hunter in Ubisoft posted a great link showing, among other information, which DX version and shader model NVIDIA cards have, worthwile having when going shopping for a second hand NV card:
http://www.hardwaresecrets.com/article/132



~S~

[Buchon]

DX10.1 is a small revision of shader model and a little Antialiasing optimization, if you have plugged a DX10 card instead a DX10.1 capable card those optimizations will not appears but you should can run the game anyways with DX10 only.

So if you are using a DX10 card instead a DX10.1 capable card the game should switch to shader model 4.0, instead 4.1, automatically.