- Apr 30, 2014
- 95
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I am trying to use a HD7990 and HD7970 in Trifire, in a Gigabyte 990FXA-D3 motherboard, which supports only dual crossfire. But my assumption was that this configuration would work because it only uses two PCI slots.
When i installed the cards, my system can recognise the 3 GPUS, and I get "3 GPUS" in GPU-Z. I can enable CrossfireX in Catalyst.
But whenever I start a game that uses the 3 cards (example, BF4), my system instantly crashes. I tried Tomb Raider, and it stuttered like crazy, and eventually crashed.
I have reinstalled windows 8, and tried BF4 again, same result.
BF4 works on both cards if they are installed on their own. My PSU is Corsair RM-1000
Is this definitely the motherboard's fault? Should I buy a new motherboard?
When i installed the cards, my system can recognise the 3 GPUS, and I get "3 GPUS" in GPU-Z. I can enable CrossfireX in Catalyst.
But whenever I start a game that uses the 3 cards (example, BF4), my system instantly crashes. I tried Tomb Raider, and it stuttered like crazy, and eventually crashed.
I have reinstalled windows 8, and tried BF4 again, same result.
BF4 works on both cards if they are installed on their own. My PSU is Corsair RM-1000
Is this definitely the motherboard's fault? Should I buy a new motherboard?
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