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What is tri-fire?

Discussion in 'Graphics Cards' started by Moodle, Apr 18, 2011.

  1. Moodle

    Associate

    Joined: Apr 11, 2011

    Posts: 78

    Location: St Helens, Merseyside

    Hi guys, as you can see in the title could someone explain tri-fire . I understand crossfire , its were two of the same gpu's can use each other to boost performance. But I have seen tri-fire with like (for example) a 6970 and two 5850 how does that work? does the 6970 boost the performance of the 5850's ?
    ,Thanks.
    ( and if you could link to a website/video about it that would also be great) because I cant find any :(
     
  2. Kasc

    Gangster

    Joined: Jun 18, 2009

    Posts: 292

    You can't have tri-fire with those 2 cards, AFAIK they have to be in the same series e.g 69XX or 68XX.

    Tri-fire could be 3x6950 or 1x6990 and 1x 6950.

    (the 6990 has 2 GPUs)
     
  3. Kotu

    Hitman

    Joined: Oct 18, 2002

    Posts: 889

    Location: UK

    from what I understand, some of the higher spec cards are infact 2 lower cards working in crossfire from the same board. So when you go for tri-fire, you use one of these dual cards and add an extra single card to run alongside it. im not sure a 6970 would work with a 5850 though, they have to be from the same generation to work together.
     
  4. Ninja12

    Associate

    Joined: Apr 16, 2011

    Posts: 34

    From what i can see, its used to using 2 cards in the same serise but that are different models, for example;

    ATi 4870X2 and 4870 1GB

    Problems with this technology is the faster card will always only be able to work as fast and the slowest card meaning it will bottle on the small card.. pretty pointless i think :confused:
     
  5. cmndr_andi

    Capodecina

    Joined: Apr 23, 2009

    Posts: 12,014

    Location: Near Bristol

    Tri fire is just crossfire with three AMD GPUs of the same family.

    This not only includes three discrete single-GPU graphic cards of the same family running together but also one single GPU and one dual GPU card (again, all using the same GPU family). For example, a 5870 and 5970 will run toether in tri fire.

    However, tri-fire does not mean you can run three cards of different families. Your example of a 6970 (single Cayman GPU per card) and two 5850 (single cypress GPU per card) would not work in tri-fire since they are of different GPU families. However, a 6970 and 6990 would run fine in tri-fire.

    This chart shows which AMD cards run together in CrossfireX (tri-fire included).

    Please bear in mind that when you run two cards in CrossfireX that are of the same family, but one is slower than the other - the arrangement will run as if it were two of the slower card running together.
     
  6. Moodle

    Associate

    Joined: Apr 11, 2011

    Posts: 78

    Location: St Helens, Merseyside

    Thanks for the quick reply's guys. One more question, to set it up is it just a crossfire bridge between each of the 3 cards ? Thanks.
     
  7. gareth170

    Capodecina

    Joined: Jan 24, 2007

    Posts: 14,072

    Location: .

    yes
     
  8. gareth170

    Capodecina

    Joined: Jan 24, 2007

    Posts: 14,072

    Location: .

    each card runs at it's own clock speed.. but can be easyly clocked to the same

    the only way you'll see it bottleneck is if the cards as different number of shaders/ROP'S
     
  9. Final8y

    Capodecina

    Joined: May 7, 2006

    Posts: 12,193

    Location: London, Ealing

    The ATI dual cards use the same high spec GPUs but at usually lower clocks.
     


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