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Doom3 on a 9600?

M

markjs

Senior member
I have a Radeon 9500np 128MB that clocks up to a 9600, and I was using it stock as a 9500 in my main machine:

AMD 1700+@1900+
Epox EP-8RDA+
1GB PC2100

I was getting 30fps with defaults at medium quality. I moved it over to my second machine when I got a 9500Pro, and that machine is:

AMD Duron 1.2GHz
ECS K7S5A
512MB PC133

All of a sudden, clocked at 9600 speed, I got 15fps and if I turn alll eye candy off and move it to low quality I still barely break 19fps. Now I know PC133 and -400MHz of CPU is going to be a hit, but that much? Even stranger is that I get almost the same 3DMark 2003 score as I used to with the first system with that card. I get around 2600 3DMarks and that ought to be enough to play Doom3 at 640x480 at 30 fps, even if I have to turn down the quality?!?! So all the obvious stuff should be right. I am using Catalyst 4.9s written for doom and my GART driver is up to date, and I have DX9.0c. So what the hell could I be missing?
 
The second machine is a pretty big drop in performance. Half the RAM, and PC133 is a BIG bottleneck. The ECS K7S5A was a good budget motherboard in its time, but it's nothing compared to an nForce2. The Duron with 400mhz shaved off is a pretty difference as well. All those things combined, I'd say, are pretty significant. I heard someone mention that doom3 can be pretty CPU dependent too.
 
MOre importantly that's a Duron core which was slower than a Tbird which is slower than the Athlon XP. Add all those things up like Click says and you have a recipe for a pretty major drop off.
 
What then explains the good 3DMark scores? They are nearly on par? I guess it could be like you said and doom3 needs more CPU.
 
Originally posted by: markjs
What then explains the good 3DMark scores? They are nearly on par? I guess it could be like you said and doom3 needs more CPU.
Click to expand...

3DMark03 is a GPU-bound benchmark. The scores will be pretty similar regardless of the CPU.
 
Seems it IS the CPU. I bumped it up to 1.3GHz and got 3 more fps. Too bad I can't bump it up farther. It just won't run stably at 112fsb.

 
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