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Forums - PC - Getting CrossfireX to work correctly, NEED HELP!!!

Vetteman94 on 18 June 2011
mibuokami said:
Vetteman94 said:
mibuokami said:
Vetteman94 said:
mibuokami said:
Vetteman94 said:
mibuokami said:

Clock speed, GPU load and GPU temperature are usually good indicators that a GPU is performing up to standard.

I suggest you download GPU-Z and FRAPS.

Turn on FRAPS and GPU-Z before running a games that has good performance scaling and see what frame rate you're getting, exist the game after a couple of minutes of playing and have a look at your GPU temperature and load. If only 1 GPU shows activity then you know that the crossfire is not working.

If both are showing activity and you simply want to know the performance boost. Disable crossfire and go into the same game again (still with GPU-Z and FRAPS on) and see if there is a noticeable drop in frame rate.

Good games to use for this test would be Metro 2033, Shogun 2, Witcher 2 or any game that can scale enough when you increase their graphic setting to stress high end GPUs.

Okay I downloaded both of those programs and it seems it is working,  as I get a considerable increase in FPS. The game I used is Crysis at max settings on a 1080P monitor, with averages from 25 with one to 40 with 2. Only thing is the second one doesnt seem to run at the same levels as the first one.  Is this normal?   The Core Clock and Memory Clock never seem to get higher than about 50% of the first one.  Anyway to change this or is this a hardware limitation?

Hahaha, sorry but that is actually one of the worst game to use to check your Crossfire prowess, Crysis has a lot of issues with SLi / Crossfire support xD.

You should normally see similar performance on both card, (at least that is the case for NVidia card... I hope ATI has the same function... sorry I don't usually get ATI cards.

Well I have the Witcher 2 but I dont want to start it yet cause I know what will happen,  my next post on here wont be for another 6 or 8 hours.

How about BF:BC2?  Is that a good one to test it.  

I am starting to wonder if I should have just went with NVidia Cards from the beginning. 

BC2 should work, there is some rendering issue for SLI on Window 7 but for your purpose (seeing if both card is performing) there shouldn't be an issue.

OK,  it does seem to help,  I the average went from 50FPS to 60FPS,  it never went higher than that though. Are games just locked in at 60FPS and wont go higher?

Turn of vertical synch. That locks the frame rate to your monitor refresh rate which is usually 60fps.

You should be getting AT LEAST 85fps...

Ah ok,  I will look into that.  

Thanks for all the help



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Vetteman94 on 18 June 2011
dahuman said:
Vetteman94 said:
dahuman said:
If the box is checked then crossfire is working. 1 or 2 bridges make no difference ATM, it's mainly for hooking up like 3+ cards that you'd use the 2nd one for the most part.

You only install CAP if it's the same version, for example, current driver is 11.6 but CAP is 11.5 CAP5, which means that 11.6 has the 11.5 CAP5 in it already with all previous ones. So you'd only install 11.6 ones when they come out. Also, you'd want to uninstall all the profiles before installing a new version of the driver just to make things clean.

How do I check which version I have,  as I dont believe I had it installed prior to today.

I see I have a similar PC builld to yours.  Minus the overclocking that you have down.  I would like to eventually do that but without any experience with it I am a little hesitant

Just look at the program install/uninstall thing in the control panel. Profile install is a seperate install to the driver install so it's easy to tell when you look at AMD stuff..

They already have 11.6 CAP1 up for Dungeon Siege 3, http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx

Also, for AA, use Edge Detect, usually 4x is good enough at 1080P and above, and you'd suffer from almost no performance loss.

OK, I found it.

And I updated the AA like you said.   

Thanks for the help.