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Crossfire Yielded No Better Performance?

post #1 of 23
Thread Starter 
Today I got my two Sapphire HD 6950 2GB Flex cards. I Crossfired them, booted, and were monitoring them with MSI Afterburner. I started playing a demanding game (for my computer at least), Company of Heroes. At 1920x1080, with settings close to maxed, I was getting 28fps in the beginning, according to FRAPS. This seems like what I was getting with a single HD 6950.

According to MSI Afterburner, each card had about 24% GPU usage. Does this mean I have a huge bottleneck somewhere, or is it just the game unable to take advantage or what? I am very unhappy right now.

My motherboard makes it x8/x8 with Crossfire but still...

Am I missing something?
post #2 of 23
Your CPU now has become a slight bottleneck. Try to OC your CPU. Some games dont work well with crossfire, some you dont see a big improvement. Some game are more CPU dependent than GPU.

Did you use the latest drivers?
Also did you download the crossfire profiles?
    
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post #3 of 23
Thread Starter 
Quote:
Originally Posted by Sp33d Junki3 View Post
Your CPU now has become a slight bottleneck. Try to OC your CPU. Some games dont work well with crossfire, some you dont see a big improvement. Some game are more CPU dependent than GPU.

Did you use the latest drivers?
Also did you download the crossfire profiles?
1. I was considering overclocking my CPU but it seems complex and time-consuming.

2. I have the latest AMD drivers; should I use the Sapphire drivers instead?

3. What do you mean by Crossfire profiles?

Also, do I need to register with Sapphire for the two year warranties or not?
post #4 of 23
1. Its good to do, and will help improve performance, not only in system but in gaming, where games take advantage of the CPU.
2. Stick with AMD 11.7
3.ATI Catalyst Application Profiles
4. Yes

Thats what OCN can help you with.
    
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post #5 of 23
Well, only think you can do is overclock your CPU, and try using the latest drivers(if you are not already), they have improvements on some games.
post #6 of 23
CPU bottlenecking your card without a doubt.

Try and get that CPU clocked as high as your comfortable withfor the moment and then start looking at a new CPU,something along the lines of 2500k.

Heck i bet its even poss that CPU would even bottleneck just 1 of your cards..well,maybe.
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post #7 of 23
Compatibility issues.

Yeah youl have a bottleneck, but its not completely the bottlenecks fault.

If you want too test that, disable 1 of your cards and look at your gpu utilization. if you get full usage, then its obviously a crossfire problem

Just google "Company of Heroes crossfire"

You should always google before starting a thread.

HTH!

edit: Hmm. I havnt found anything on google yet for you...

PS: Welcome to the world of multi-GPU compatibility issues
Edited by jacobrjett - 8/2/11 at 6:17pm
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post #8 of 23
Thread Starter 
Okay, I will try overclocking since a new CPU is not going to happen anytime soon.

1. Is a Sandybridge i5 2500K almost as good as an i7 2600K as far as getting rid of the bottleneck?

2. My motherboard has ASUS TurboV or TurboKey for overclocking; should I use that or just manually tweaking the BIOS?

3. Now that I have two cards not pushing air out of the case like the reference card, should I add my second top fan on my HAF X?

Thanks!

EDIT: Also, I got 4 Dirt 3 coupons. Each has a different code. Two were in each of the boxes, and two came in a separate bag shipped to me. Does this mean I have 4 free copies, or will only two work? Do I have to use my contact info for each one or can the other people I give them to use their contact info?
Edited by Brandonn2010 - 8/2/11 at 6:50pm
post #9 of 23
Thread Starter 
I'm thinking it might have just been Company of Heroes, because I just finished playing Sins of a Solar Empire and checked MSI AB, and the usage was 89% on one card and 90% on the second.
post #10 of 23
Quote:
Originally Posted by superj1977 View Post
CPU bottlenecking your card without a doubt.

Try and get that CPU clocked as high as your comfortable withfor the moment and then start looking at a new CPU,something along the lines of 2500k.

Heck i bet its even poss that CPU would even bottleneck just 1 of your cards..well,maybe.
LOL, this is like the 10th thread I've seen this dude say your cpu is bottlenecking and suggesting a 2500k or 2600k.

But this time...he may be right.

Company of Heroes came out like 6 years ago dude. Put in BFB2 or Crysis 2 or Witcher or Dirt 3 or Need for speed or Fallout 3 or GTAIV then we can help you better.

Its possible its the game.
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