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5970's in crossfire..crossfire doesnt enable

Tags:
  • Radeon
  • Crossfire
  • Graphics
Last response: in Graphics Cards
March 15, 2010 8:00:53 PM

hi guys,

im running dual 5970 cards.. seems that , under 10.2 I get the option to crossfire the cards, but after i hit enable and then hit apply it goes away?

any ideas?
phil

More about : 5970 crossfire crossfire doesnt enable

March 15, 2010 8:04:57 PM

run GPUz, and start up some games. See if you can monitor both cards and see the GPU utilization go up on all 4 cores. If that doesn't work, the it might be as simple as just uninstalling and reinstalling the drivers to get them both going. You might even try going to the 10.3 Beta drivers.
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March 15, 2010 8:08:24 PM

Did you connect the crossfire cable? Have you tried each card individually to ensure that they are fine? May just be a driver problem.
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March 15, 2010 8:08:38 PM

can you give me a link for 10.3?
thank you for your help
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March 15, 2010 8:10:05 PM

yes device manager sees both cards..the same way it saw my 4870x2's , as 4 cards.. and the option to crossfire IS there, just doesnt let me enable it?
I figured either do a clean driver install OR the crossfire cable coule be bad..but Im guessing its software..
also,does crossfire not work in eyefinity? ive read different postings about that that some do and some dont.
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March 15, 2010 9:25:59 PM

do you know if this 10.3 contains that hotfix for eyefinity+ crossfire support?
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March 15, 2010 9:37:57 PM

10.2 contains the fix for crossfire+eyefinity, so yes, 10.3 will also have that.
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March 15, 2010 9:39:29 PM

10.3 seems to have done the trick for me..crossfire is enabled ..so now I should get great FPS with battlefield 2 right?! :)  thanks for the link finni
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March 15, 2010 9:44:25 PM

Should be getting good FPS yes. lol. My 5750s are scaling at 80%+ in everything I've run that is Crossfirex compatible (up to 89% increase in 3dMark Vantage)
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March 15, 2010 9:47:05 PM

finni, get this..I attempted ot play bad company 2 in crossfire and it actually performs worse :( 
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March 15, 2010 9:47:57 PM

do you know if there a way to tlel if some of th upcoming games, just cause 2 and metro 2033 support eyefinity/crossfire?
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March 15, 2010 9:59:35 PM

Well, thats a little odd... What types of frame rates are you getting? Also- are you monitoring your GPU's with something like GPU-z to see what your GPU loading is like? That way at least you can see if you are actually using all 4 GPUs.

As far as the new games and cross/finity go, I really couldn't tell you, but I imagine that most new games will be much more likely to be compatible than current or older games.
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March 15, 2010 10:18:47 PM

how DOES quadfire/tri fire work, all gpu's working together as one or as needed? Ive heard both actually
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March 15, 2010 10:19:54 PM

also, I just got gpuz that monitors my gpu usage..I would have to not use eyefinity right and just use one monitor so I could run this on another monitor and well, monitor use, right?
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March 15, 2010 10:31:47 PM

I believe it will work the same at this point as crossfire with 2 cards- AFR (alternate frame rendering), which means the gpu's render frames in sequence. In a dual GPU setup, every other frame is rendered by one GPU, and the odd frames by the second GPU. In a 4 GPU setup I would guess that each GPU will render every 4th frame. (I'm not totally positive, but this is my guess).

You would probably want to run without Eyefinity on so you can see your monitoring programs yes, but you can probably also do it by having GPU-z refresh in the background, then alt-tab out of the game and see if the GPU's were all loading, or if just one or 2 of them was loading.

Also- how many Crossfire bridges are you using?
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March 15, 2010 10:33:38 PM

just one crossfire bridge..
I tried avp and bad company 2 and both performed horrible with crossfire enabled
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March 15, 2010 10:37:56 PM

you Might try using 2 crossfire bridges (I know you normally are supposed to use 1, but you have 2 GPU's on each board, so you might need the extra bandwidth). Its worth a try:-)
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March 15, 2010 10:47:36 PM

is that even possible?
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March 15, 2010 10:48:14 PM

does the card even have a slot for a second crossbridge connection? I didnt see one, but then again I didnt look, I mimiced the setup of my 4870x2 as those only had one crossbridge
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March 16, 2010 4:02:22 AM

no, the 5970 only has one crossfire connector (thats all it needs). the cards do not communicate through the connector, they communicate through the PCIe/mobo.

it may bve that these games do not support crossfire just yet. check out the official forums for those games, you should get some answers there.
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March 16, 2010 2:20:26 PM

Pnico- sorry about that, didn't realize they only had one crossfire bridge connector. just thought it might have been worth a try. (Just working through the things I would try if I had that setup). Not sure where to go from there- I'm kinda at the end of my knowledge here when it comes to crossfireX and multi-GPU setups as I've just gotten mine and its been relatively trouble free.
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March 16, 2010 6:11:36 PM

pnico said:
finni, get this..I attempted ot play bad company 2 in crossfire and it actually performs worse :( 


:(  This is a common problem, the thing is that you're motherboard doesn't have enogh bandwith to support 4 GPUs and have them all run at 8x 8x 8x 8x, Intead it's going at 8x 8x 4x 4x or something like that.

What motherboard are you using?
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March 16, 2010 6:27:55 PM

Its an x58 board that he previously ran 2x 4870x2's on (member config is in his profile), should have plenty of bandwidth to run 2x 5970's. Seems like a different issue to me- not a PCI-e lanes issue.
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