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Plzz help having problems with crossfire on two hd 7770's

Last response: in Graphics & Displays
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May 31, 2012 3:40:36 AM

HI i have been trying like crazy to get my cards to run in crossfireX i have just bought a new system that is as follows

ASUS Crosshair V Formula AM3+ DDR3 ATX AMD 990FX 4PCI-E16 1PCI CrossFireX 6 SATA 6GB/S Motherboard

2 xfx hd radeons 7770 1gb w/ 4.95ghz of ddr5 memory

amd bulldozer 8 core

1000w cosair PSU

16gb of gskill ddr3 @ 2140mhz or something like that but tuned down to 1600mhz

I have tried changing the slots of the cards but the mobo manual says to use slot 1 and 3 to achieve 16x native to both cards and in my bios it show that both cards are running at that speed and i have the bridge on the card seated firmly, but in CCC or Vision control center it shows enable crossfirex grayed out and give the following error The AMD CrossFireX internal bridge interconnects linking your graphics cards together are not properly attached. Both bridge interconnects must be attached. For more information, see the user's guide for your graphics card


PLZZ HELP!!!!!!!!!!!!!!
May 31, 2012 3:52:27 AM

Have you tried re-installing drivers? Also you could try using a different crossfire bridge.
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May 31, 2012 3:55:47 AM

Have you tried booting and using the computer with just one card connected.....
If it works then you can update the drivers to the latest and enable options for CrossfireX
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May 31, 2012 3:58:17 AM

i have the latest drivers and have bench marked both card individually and I have bought a new bridge and still no luck
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May 31, 2012 3:59:46 AM

the two bridges I have look identicle , are there different styles of crossfire cables or bridges
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May 31, 2012 4:01:51 AM

Have to make sure your bridge is connected properly and try the older bridge. You can also download GPU-Z from techpowerup to see if Crossfire is enabled. It will say crossfire enabled near the bottom, if not, it is not working.

GPU-Z download:
http://www.techpowerup.com/downloads/
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May 31, 2012 4:03:27 AM

i have done both but had no luck gpuz shows crossfire disabled
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May 31, 2012 4:04:55 AM

i know its not working because in Vision control center it wont let me enable the crossfire because it is grayed out and says The AMD CrossFireX internal bridge interconnects linking your graphics cards together are not properly attached. Both bridge interconnects must be attached. For more information, see the user's guide for your graphics card
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May 31, 2012 4:06:04 AM

try another dual slot just to make sure.
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May 31, 2012 4:08:50 AM

the only way to get full 16x and 16x native speeds on both cards is to use slot 1 and 3 plus if i didnt there would be no breathing room for air if they were in slots 1 and 2 . plus motherboard manual says i should be using 1 and 3 neways.... uuuhhgg i hate crossfire lol should have went with SLI ....:p 
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May 31, 2012 4:14:12 AM

nope tried 2 and 4 not working
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May 31, 2012 4:26:01 AM

did you try going into the device manager and uninstalling both cards and reboot ? Let windows find the cards. Then you can try installing the drivers along with the CCC........... or you can jump over to Windows Update and see if it picks something up. Matter of fact I would try update now.
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May 31, 2012 4:40:25 AM

nope i havent tried that but i will tonight and ill get bck to u guys in the morning . getting late here. and been at this for bout 18 hrs now constantly . thanks for everything and i will be back tomorrow n hopefully resolved . if i tested both the cards and they worked by themselves but wont run in crossfire in the right slots on the motherboard , should i return the cards or the motherboard ? assuming i cant fix it by tomorrow night.
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May 31, 2012 4:49:44 AM

you're using only one xfire cable right > and it fits snug so you need to apply pressure to make it fit....... mine were tough for some reason. first time ever I actually think I heard them "snap' into place.

testing each card in both slots............ not just 2 cards in one slot.

see how things go before thinking of rma-ing.

probably a software issue. you'll have to keep working at it.

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May 31, 2012 6:31:49 AM

It could be a faulty crossfire finger on one of the cards.Which one it is though would be hard to tell.I would return the GPU's before the motherboard.
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