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Is this all crossfire compatible

I'm getting the power supply, motherboard and cooling for my first gaming PC next month and I was wondering if I will be able to get two R9 280 (non x)s without any problems, running in crossfire. (I have everything else.)
GPU: MSI Twin Frozr R9 280
Motherboard: Gigabyte GA-970A-UD3P
Power supply: Corsair TX750M Hybrid Modular PSU
4 questions: Can this GPU even run crossfire? Is that power supply enough? Does that motherboard support crossfire? If all yes do I need a crossfire bridge?
Thanks.
5 answers Last reply Best Answer
More about crossfire compatible
  1. Motherboard runs CrossFireX but not in good performance (X16-X4 i'm not even talking about PCI-E gen. 2), 750W (since R9 280 is just re-badged HD-7950 http://www.tomshardware.com/forum/325953-28-750w-850w-crossfire-7950) plenty for CrossFireX of two R9 280's and R9 280's are CrossFireX compatible (I'm pretty sure that 280 can go 4way CF :)).

    Edit: If you want good performance, better to get single powerful GPU like R9 290(X) or GTX-780(ti)
  2. Ahmadjon said:
    Motherboard runs CrossFireX but not in good performance (X16-X4 i'm not even talking about PCI-E gen. 2), 750W (since R9 280 is just re-badged HD-7950 http://www.tomshardware.com/forum/325953-28-750w-850w-crossfire-7950) plenty for CrossFireX of two R9 280's and R9 280's are CrossFireX compatible (I'm pretty sure that 280 can go 4way CF :)).

    Edit: If you want good performance, better to get single powerful GPU like R9 290(X) or GTX-780(ti)


    Yeah, I want to have two GPUs because it's modular and I can get one at a time. How much of an impact will that X4 bandwidth make compared to if it was 16 pin x16 bandwidth?
  3. Nagromicous said:
    Ahmadjon said:
    Motherboard runs CrossFireX but not in good performance (X16-X4 i'm not even talking about PCI-E gen. 2), 750W (since R9 280 is just re-badged HD-7950 http://www.tomshardware.com/forum/325953-28-750w-850w-crossfire-7950) plenty for CrossFireX of two R9 280's and R9 280's are CrossFireX compatible (I'm pretty sure that 280 can go 4way CF :)).

    Edit: If you want good performance, better to get single powerful GPU like R9 290(X) or GTX-780(ti)


    Yeah, I want to have two GPUs because it's modular and I can get one at a time. How much of an impact will that X4 bandwidth make compared to if it was 16 pin x16 bandwidth?


    Here you'll find answer http://www.tomshardware.com/reviews/pci-express-scaling-p67-chipset-gaming-performance,2887-10.html
    And I'm pretty sure that in PCI-E gen.3 GPU performance impact would be higher.
  4. Ahmadjon said:
    Nagromicous said:
    Ahmadjon said:
    Motherboard runs CrossFireX but not in good performance (X16-X4 i'm not even talking about PCI-E gen. 2), 750W (since R9 280 is just re-badged HD-7950 http://www.tomshardware.com/forum/325953-28-750w-850w-crossfire-7950) plenty for CrossFireX of two R9 280's and R9 280's are CrossFireX compatible (I'm pretty sure that 280 can go 4way CF :)).

    Edit: If you want good performance, better to get single powerful GPU like R9 290(X) or GTX-780(ti)


    Yeah, I want to have two GPUs because it's modular and I can get one at a time. How much of an impact will that X4 bandwidth make compared to if it was 16 pin x16 bandwidth?


    Here you'll find answer http://www.tomshardware.com/reviews/pci-express-scaling-p67-chipset-gaming-performance,2887-10.html
    And I'm pretty sure that in PCI-E gen.3 GPU performance impact would be higher.


    Okay thanks for the reply, so I could get at least a 50% improvement with the extra GPU on any game (I don't plan to play F1... ever) Correct me if I'm wrong and if that's correct then don't trouble yourself with replying.
  5. Best answer
    Nagromicous said:
    Ahmadjon said:
    Nagromicous said:
    Ahmadjon said:
    Motherboard runs CrossFireX but not in good performance (X16-X4 i'm not even talking about PCI-E gen. 2), 750W (since R9 280 is just re-badged HD-7950 http://www.tomshardware.com/forum/325953-28-750w-850w-crossfire-7950) plenty for CrossFireX of two R9 280's and R9 280's are CrossFireX compatible (I'm pretty sure that 280 can go 4way CF :)).

    Edit: If you want good performance, better to get single powerful GPU like R9 290(X) or GTX-780(ti)


    Yeah, I want to have two GPUs because it's modular and I can get one at a time. How much of an impact will that X4 bandwidth make compared to if it was 16 pin x16 bandwidth?


    Here you'll find answer http://www.tomshardware.com/reviews/pci-express-scaling-p67-chipset-gaming-performance,2887-10.html
    And I'm pretty sure that in PCI-E gen.3 GPU performance impact would be higher.


    Okay thanks for the reply, so I could get at least a 50% improvement with the extra GPU on any game (I don't plan to play F1... ever) Correct me if I'm wrong and if that's correct then don't trouble yourself with replying.


    I wouldn't try to CrossFireX with X16-X4 and even with AMD cards because AMD has not so good CF optimization than SLI have, so additional card might not work good at all, I would try to sell your current GPU and get new more powerful one or change motherboard to at least M5A99X EVO or 990FXA UD3
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