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Sapphire 6950 XFIRE Issues

post #1 of 10
Thread Starter 
For some reason when I go into CCC and I attempt to enable Crossfire on both my 6950s one of my displays goes away? Is this normal? I have them both hooked up to their own monitors. One of them has a DVI and the other a VGA with a DVI converter. Any clue what could be going on here?
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Nachielous
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post #2 of 10
Both monitors have to be connected to the main card.
    
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post #3 of 10
See above. Crossfire is enabling the second GPU to be a supporting device to the primary and not a stand alone functional GPU. Your monitors need to be attached to the primary card.
ORL||H2O
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post #4 of 10
Thread Starter 
Ahh now I feel really stupid I thought they could both be on separate monitors I apologize guys. Also when I tried to do a mild overclock on both cards U recieved a blue screen of death and apparently MSI Afterburner caused the problem. Is it harder to oc two cards as opposed to one ?

Thank you +Rep
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Nachielous
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post #5 of 10
Quote:
Originally Posted by nachielous;15324580 
Ahh now I feel really stupid I thought they could both be on separate monitors I apologize guys. Also when I tried to do a mild overclock on both cards U recieved a blue screen of death and apparently MSI Afterburner caused the problem. Is it harder to oc two cards as opposed to one ?

Thank you +Rep

No big deal, I made the same mistake when I bought my second 6950. As for the Afterburner, make sure you have "Synchronize settings for similar graphics processors" selected under settings. Make small steps with the OC and test to determine how far you can OC at stock voltages.
    
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post #6 of 10
Thread Starter 
Do you actually see a huge performance increase when you OC them both?

Also I stream alot and sadly most games can only be streamed in windowed mode is it possible to have xfire enabled in windowed mode?

I can stream @ 720p would be nice to go up to 1080p
http://www.twitch.tv/nachielous/b/297506355
Edited by nachielous - 10/15/11 at 7:20pm
Nachielous
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Nachielous
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post #7 of 10
Which Sapphire HD-6950 cards do you have ?

If they're the DIRT3 or TOXIC edition's you could maybe BOTH OC AND UnLock ... Both cards, and then YES you'd see some pretty substantial gains, otherwise you'd at least see some gain by just overclocking, somewhere in the 8-15% range depending on how far you can /or can't push both cards.

Edited by LA_Kings_Fan - 10/15/11 at 7:21pm
   
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post #8 of 10
Quote:
Originally Posted by nachielous;15324653 
Do you actually see a huge performance increase when you OC them both?

Also I stream alot and sadly most games can only be streamed in windowed mode is it possible to have xfire enabled in windowed mode?

I can stream @ 720p would be nice to go up to 1080p
http://www.twitch.tv/nachielous/b/297506355

In demanding games like Crysis and Metro 2033 the OC does make a noticeable difference especially when running eyefinity.

In my experience the second card does not get utilized in windowed mode. I've never streamed games but it might work.
    
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post #9 of 10
Thread Starter 
One of them was one of the older 6950 Sapphires that I was told could be unlocked to 6970 (flashing the bios or something) I tried to get the same card but I ended up getting the Flex 6950 and it did come with a free copy of DIRT 3 so I assume thats what your talking about.
--

Currently at 900/1400 wand everything seemed to run okay..
SCORE: 2672 points (62 FPS, 130000 ms) Temps didnt exceed 62C
Going to continue going up by 5s when should I back down?
Edited by nachielous - 10/15/11 at 7:43pm
Nachielous
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Nachielous
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post #10 of 10
Quote:
Originally Posted by nachielous;15324831 
I tried to get the same card but I ended up getting the Flex 6950 and it did come with a free copy of DIRT 3 so I assume thats what your talking about.

No ... I wasn't ...

THIS IS THE Sapphire DIRT3 edition HD-6950 card (it has a 2nd Bios on the card and a switch to chose between Bios #1 & #2, thus has a chance at UnLocking and/or Flashing safely, like your Reference card has.)

11188-05_HD6950_Dirt3_2GBGDDR5_DP_HDMI_2DVI_PCIE_FBC_634475572842855911_600_600.jpg

THIS IS THE Sapphire FLEX edition HD-6950 card (NO 2nd Bios and NO switch, thus WILL NOT UnLock or Flash safely, will always be JUST a 6950.)

11188-04_HD6950_flex_2GBGDDR5_2miniDP_HDMI_2DVI_PCIE_FBC_634414171219021251_600_600.jpg

Which is explains why one of the cards is holding you back some in X-Fire, the FLEX edition card isn't really the ideal card to have in this configuration IMO.
   
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