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When Gaming with 4870x2 gpu 2 isn't at 100%

post #1 of 11
Thread Starter 
When I game with my xfired 4870x2, i notice sometimes that one gpu 1 is at 100% but gpu might be at like 7% or even 0%, only in some games are both gpu's are at 100%. Why is this? Are my drivers crap? Any help would be great..
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post #2 of 11
Some games are not optimized for or behave poorly with crossfire.
    
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post #3 of 11
What games and what drivers? If I have the same guess I could see if I have the same prob.

Everyone talks about amd's drivers but I've rarely had a problem, even with brand new games. My gpu run @ 99% with little dips here and there on the games I play.
    
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post #4 of 11
Thread Starter 
Quote:
What games and what drivers? If I have the same guess I could see if I have the same prob.
I got 10.12 drivers and games like garrys mod and fallout new vegas only use 1 gpu at 100%
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El Computron
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post #5 of 11
I don't have garry's mod, but I'll see if I can test fallout this weekend.

You don't have catalyst AI disabled do you?
    
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post #6 of 11
Thread Starter 
Not sure, I have't checked
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El Computron
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post #7 of 11
If cat AI is disabled, crossfire won't be enabled, and therefore, only one core will run.

You may find it annoying, but I enable the system tray icon under preferences in CCC, then go down to the system tray icon and in the drop down menus by one of the 4870 x2 listings it'll have enable crossfire something or another, I don't recall(I'm not at home). If that's enabled it'll have the crossfire icon in the corner of your screen if both gpu are rendering.

I guess it is just is easy the way you're checking as well. I assume your using rivatuner or something else and alt-tabbing out of the game and looking at the GPU0 and GPU1 load graphs?
    
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post #8 of 11
Thread Starter 
in gpu z it says that both are enabled in crossfire, but in ccc i cant even find the option where it says to enable crossfire or not, the option isnt even in the tool tray
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El Computron
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post #9 of 11
The poster above you told you where you can find it. It's under Catalyst AI, and it must be enabled for Crossfire to work. It's under 3d settings.
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Up & Running
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post #10 of 11
I just ran Fallout NV for a bit. At 1920 x 1080, Ultra settings, AA @ 8x, I'm getting 80 - 90 fps outside in Primm, whilst rivatuner shows that both gpus hover around ~70%. The game must be cpu bound for me. Not really that taxing for the 4870x2. Unless you run really high res or have a highly clocked proc(faster than me) you're not going to see 100% gpu usage in this game.

You do need to enable catalyst AI, however. If it's enabled and you're not seeing both gpu's working, we'll dive into this deeper.
    
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