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Crossfired 7970s; Flickering and Low usage

post #1 of 10
Thread Starter 
Hello guys,

I'll need to ask for your help once more because I'm ready to throw my monitor out of the window.
I have a serious problem with Crossfire. Before you write for any hardware issues I want to tell you that each card runs perfectly fine when it's single and the problem happens when I enable Crossfire.

I have check cables, PCI's, drivers 12.6 and 12.8 with no luck. I don't think psu has any problem to power these cards and in general I don't think it's a hardware problem.

I have also tried to uninstall the drivers with Bradley's way (which I never had a single problem before) and with the usual noob way of just click uninstall from the .exe.

Sadly, nothing changed that flickering and the usage is around 43%...

Edited by andrew grp - 10/8/12 at 2:50pm
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post #2 of 10
are both card running at the same speeds... could also be your crossfire cable?
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post #3 of 10
Thread Starter 
Yes, both cards are running the same, sadly I don't have another longer crossfire bridge.

It's really a strange issue, at least for me, and I don't have a clue how to solve it.
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post #4 of 10
well it prob is a crossfire cable...i would think..try reseating it..turning it the other way..lol i dunno
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post #5 of 10
Run Afterburner and set it to show the core/mem clocks in the OSD. What do they show? Is it fluctuating?
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post #6 of 10
Thread Starter 
Hello tsm,

Thanks for coming into my thread.

Look the best picture ever, I call it "Darkness"




Don't worry about that slight ocing, I just did that just for testing... yep, didn't work.
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post #7 of 10
Quote:
Originally Posted by andrew grp View Post

Hello tsm,
Thanks for coming into my thread.
Look the best picture ever, I call it "Darkness"


Don't worry about that slight ocing, I just did that just for testing... yep, didn't work.

OSD is not showing gpu2 clocks. WHat are your % readings btw, you have a lot of them?

How are you overclocking? Are you using the -xcl method, is ULPS on too? It looks like ULPS is on due to the missing clock readings for gpu2.
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post #8 of 10
Thread Starter 
Overclocking is not the issue here, cards are back to defaults and I installed 12.8 again.

I'm thinking that it might be the bridge that is causing all those issues.


The gpu usage is around 43% and my fps are lower than with a single card...53fps is not right at all.

And why I can't see my clocks of my second card in CCC?



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post #9 of 10
Quote:
Originally Posted by andrew grp View Post

Overclocking is not the issue here, cards are back to defaults and I installed 12.8 again.
I'm thinking that it might be the bridge that is causing all those issues.
The gpu usage is around 43% and my fps are lower than with a single card...53fps is not right at all.
And why I can't see my clocks of my second card in CCC? Warning: Spoiler! (Click to show)


By default ULPS is enabled on every driver install. ULPS essentially puts the slave cards into a sleep state after Powerplay drops them down to idle clocks. The problem with monitoring is that lots of apps cannot obviously see these sleeping cards, that's why the clock frequencies are missing from the OSD, the temp readings make it thru though. An easy way to wake up the card is to run gpu-z, then close it before you enter a game. Gpuz will wake up the card allowing AB time to read the sensors. I understand your usage is low, poor frames, but I need to see if the card is clocking up like its supposed to. The data displayed in your screens is probably more confusing than explanative.
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post #10 of 10
Quote:
Originally Posted by tsm106 View Post

Quote:
Originally Posted by andrew grp View Post

Overclocking is not the issue here, cards are back to defaults and I installed 12.8 again.
I'm thinking that it might be the bridge that is causing all those issues.
The gpu usage is around 43% and my fps are lower than with a single card...53fps is not right at all.
And why I can't see my clocks of my second card in CCC? Warning: Spoiler! (Click to show)


By default ULPS is enabled on every driver install. ULPS essentially puts the slave cards into a sleep state after Powerplay drops them down to idle clocks. The problem with monitoring is that lots of apps cannot obviously see these sleeping cards, that's why the clock frequencies are missing from the OSD, the temp readings make it thru though. An easy way to wake up the card is to run gpu-z, then close it before you enter a game. Gpuz will wake up the card allowing AB time to read the sensors. I understand your usage is low, poor frames, but I need to see if the card is clocking up like its supposed to. The data displayed in your screens is probably more confusing than explanative.

Based off of that, he has full clock rates up. Just from experience.

The first thing he should probably try is a different game or benchmark. Heaven and 3DMark11 will give you near 99% GPU usage if everything is working correctly. Its working for one means its capable of working and that its just BF3 or Drivers / CAP with BF3.

For the record, do you have an OC on your CPU?
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