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Crossfire, Please help!!

Tags:
  • Graphics Cards
  • Crossfire
  • Motherboards
  • Graphics
Last response: in Graphics & Displays
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September 30, 2014 1:03:15 PM

Hi there guys I've had my second graphics card in my PC now for 2 weeks and are wondering if I've got my crossfire on. I've gotten two R9 290 Tri-X Sapphire cards with a Z97-K motherboard. These cards use the AMD CrossFireX, This motherboard does support this and I can't seem to get my crossfire working. I go into the CCC (Catalyst) and go on to the "Gaming" and there isn't a CrossfireX, These cards DO NOT NEED THE CROSSFIRE BRIGE. These two GPU's are working because I switched them around and they work and in device manger there both coming up and it says "working properly" I've been able to run a monitor off the second GPU so I know it's working fine. Does anyone know what my problem is and if I need to enable crossfire in my motherboard BIOIS.

Please help
Thanks so much.

More about : crossfire

a b U Graphics card
a c 108 V Motherboard
September 30, 2014 1:49:39 PM

go into bios and force PCIe x16_2 slot to operate at x4 mode. (default is x2) . also since it shares bandwidth with the rest of pciex1 slots , you cant have any other slot occupied!
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September 30, 2014 11:22:39 PM

chris987 said:
go into bios and force PCIe x16_2 slot to operate at x4 mode. (default is x2) . also since it shares bandwidth with the rest of pciex1 slots , you cant have any other slot occupied!


I done all of this and it's still not got an enable crossfire button, do you know why?
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a c 333 U Graphics card
a c 367 V Motherboard
September 30, 2014 11:38:22 PM

First of all, i do not know why you decided to crossfire on that board at all, as the second slot runs at X4.

1 x PCIe 3.0/2.0 x16 (x16 mode, gray)
1 x PCIe 2.0 x16 (max at x4 mode, black) *1

X4 mode cant support Crossfire with that card, the bandwidth is too low. In other cases having a lesser powerful card in X4 works, but your motherboard is the problem here.

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September 30, 2014 11:39:52 PM

chris987 said:
go into bios and force PCIe x16_2 slot to operate at x4 mode. (default is x2) . also since it shares bandwidth with the rest of pciex1 slots , you cant have any other slot occupied!


So I need to get a new motherboard?
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a c 333 U Graphics card
a c 367 V Motherboard
September 30, 2014 11:42:29 PM

The bottleneck is too great when running in X4, so I would advise that you get a new motherboard which supports crossfire in either these configurations -

X16/X16

X16/X8

X8/X8
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September 30, 2014 11:44:12 PM

unknownofprob said:
The bottleneck is too great when running in X4, so I would advise that you get a new motherboard which supports crossfire in either these configurations -

X16/X16

X16/X8

X8/X8


What motherboard would you say? That doesn't cost to much money and supports the i7 2790k âž–
CPU
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a c 333 U Graphics card
a c 367 V Motherboard
September 30, 2014 11:58:02 PM

if you mean 4790k then these motherboards -

Asus Z97-A

ASRock Z97X Killer
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October 3, 2014 11:45:46 PM

unknownofprob said:
if you mean 4790k then these motherboards -

Asus Z97-A

ASRock Z97X Killer


So if I get one of these's motherboards will the crossfireX be working?
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a c 333 U Graphics card
a c 367 V Motherboard
October 3, 2014 11:49:40 PM

should, yes. I would also get your current Z97-K board tested to see if it has any problems with the slots, just in case you purchase a board and the same thing happens. This will determine if the card is not at fault, or if both are.
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October 8, 2014 11:24:40 AM

unknownofprob said:
should, yes. I would also get your current Z97-K board tested to see if it has any problems with the slots, just in case you purchase a board and the same thing happens. This will determine if the card is not at fault, or if both are.


So at the moment the 2nd card isn't running at it's full extent? and if i get one of these motherboard's the 2nd one will be running as fast as it can?
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a c 333 U Graphics card
a c 367 V Motherboard
October 8, 2014 11:26:18 AM

yes. that is correct.
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October 8, 2014 11:27:25 AM

unknownofprob said:
yes. that is correct.


Ok that make's sense because i got the crossfire working but i get low FPS so that's why.. Thanks :) 
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a c 333 U Graphics card
a c 367 V Motherboard
October 8, 2014 11:29:38 AM

no problem :) 
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