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Old 03-30-06, 07:44 AM   #1
pcman
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Default Not many frames in Doom 3 as I expected

Hello friends!

As an Nvidia fan, I got recently my new Geforce 6600GT AGP. I'm running Mandriva Linux 2005 LE. I downloaded and installed the latest drivers (1.0-8178) succesfully. Now what's the problem. I run Doom 3 and no matter what settings I choose I always get 30-40 fps (console and run timedemo demo1). I have a Pentium 4 2.5 MHz and 512 MB Ram. A friend of mine has about the same system (the only difference is he has 1 GB of memory), he runs Windows XP Professional, he has an Ati Radeon 9800 Pro and he gets 55-60 fps (for the same demo). But based on the benchmarks of www.nvnews.net (http://www.nvnews.net/previews/gefor...p/page_3.shtml) my GPU should be faster than Radeon 9800, not only because it's a better GPU but also because I run a lighter operating system. I also noticed that when I run older games like Quake 1, 2 and 3 althought the games run almost perfectly, most time I run them there are lots of times that they loose frames. So I'm asking: 1) Why I'm getting this low performance? 2) Is there a chance I don't get the maximum performance? 3) If so, what can I do to get it? 4) Are there are any utilities to get a higher performance in linux, except overclocking?

Thank you very much!
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Old 03-30-06, 12:38 PM   #2
kriko
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Default Re: Not many frames in Doom 3 as I expected

Go to doom3 folder, an link:
libgcc_s.so.1 libstdc++.so.5
to your distro preinstalled (In my case: libgcc_s.so.1 -> /usr/lib/libgcc_s.so and libstdc++.so.5 -> /usr/lib/libstdc++.so.5), this boosted performance here.

I noticed hitching if superkaramba is running in background, so you should quit it before entering the game. You can try to run doom3 from console (I mean pure console, no X - e.g.: xinit /usr/local/games/doom3).
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Old 03-30-06, 02:22 PM   #3
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Default Re: Not many frames in Doom 3 as I expected

cat /proc/driver/nvidia/agp/status , please
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Old 03-30-06, 03:09 PM   #4
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Default

@kriko:

I created the links you said for Doom 3 and the performance descreased even more, about 27-30fps. And I don't run superkaramba anyway.

@d13f00l:

Here is the result of cat /proc/driver/nvidia/agp/status:

$ cat /proc/driver/nvidia/agp/status
Status: Enabled
Driver: AGPGART
AGP Rate: 4x
Fast Writes: Disabled
SBA: Enabled

I notice that the AGP rate is 4x, while it should be 8x (both my motherboard and my GPU support it).
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Old 04-15-06, 10:32 AM   #5
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Default Re: Not many frames in Doom 3 as I expected

You could try using nvagp instead of agpgart:

Code:
Option "nvAGP"                       "1"
In your XOrg configuration file.
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Old 04-17-06, 01:13 PM   #6
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Default Re: Not many frames in Doom 3 as I expected

Why should Linux outperform Windows for gaming?
Since Windows is 98% of the gaming market you can expect that windows drivers are much more optimized (this is at least the case for ATI) than Linux' one.
This also applies to the the game binaries themself, too.

Gaming is mostly hw-limited, therefor a different OS does not make much difference if its architekture has compareable overhead. (Thats the case for OpenGL/Linux vs. OpenGL/NT)
Because of its design Win9x can have much less overhead.

However you're right the difference you're seeing is not really explainable, maybe you CPU is downclocked somehow under Linux?

lg Clemens
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Old 04-17-06, 03:56 PM   #7
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Default Re: Not many frames in Doom 3 as I expected

Plays fine here,I get around 60 fps on doom 3 with my amd64 1.8 ghz,512mb ram,geforce 6600 pci-e,debian.This is with the ultra quality settings,1024x768 resolution.id does good linux ports.
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