crossfiring two radeon hd 7770`s

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opio

opio

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May 10, 2013
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I have this mobo http://www.evga.com/articles/00438/

and two sapphire radeon hd 7770's

On gpu-z it says that crossfire is disabled but it says (crossfire available)
 
Solution
Shaun o
Check the positions where the two cards must be placed on the board in respect to the order of Pci-e slots.

It matters where you place them.
make sure the cross fire bridge is installed to both cards.
Any other overclocking tool such as evga overclock should also be removed.

If you had only one prior to the setup, then you need to clean uninstall any Ati video drivers.

Then re install Ati drivers.

You should then go into CCC where you should be able from the options to select crossfire mode. Where it should not be grayed out and be enabled.

It should crossfire the two 7770 cards then.
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Shaun o

Shaun o

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Oct 7, 2007
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Check the positions where the two cards must be placed on the board in respect to the order of Pci-e slots.

It matters where you place them.
make sure the cross fire bridge is installed to both cards.
Any other overclocking tool such as evga overclock should also be removed.

If you had only one prior to the setup, then you need to clean uninstall any Ati video drivers.

Then re install Ati drivers.

You should then go into CCC where you should be able from the options to select crossfire mode. Where it should not be grayed out and be enabled.

It should crossfire the two 7770 cards then.
 
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Solution
opio

opio

Distinguished
May 10, 2013
602
0
19,010


word man I looked in catalyst and saw it was right there, was kind of a dumb question on my part, but anyway I have another question maybe you know the answer to.
My mobo is an EVGA X58 tri sli, it just also supports crossfire. Let's assume my mobo supports tri crossfire for a moment (I still haven't looked around and checked on that yet I want to see if I can even crossfire three 7770's first) So I guess the question is then obvious, can I tri crossfire three hd 7770's? Here's the kicker though, the first 7770 I bought about a year ago has a slot for the crossfire bridge. The new one I just bought does not, but they still crossfire, I'm still able to go to catalyst and turn on crossfire and gpu-z says: crossfired (enabled
), I guess they just don't need a bridge? If I bought a third card I would make sure it has the bridge slot. What I would do is put the two cards with crossfire bridge slots in my two pci-e 2.0 x16 slots and put the third card without a slot into the pci-e 2.0 x8. Would it work? Would I even need the bridge as the two I currently have are crossfired with no bridge?
 
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