how much faster is quad 5870's than dual 5970's

Discussion in 'Videocards - AMD Radeon' started by zoso_the_hippy, Aug 1, 2010.

  1. zoso_the_hippy

    zoso_the_hippy Master Guru

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    hey how it going? i was wondering if anyone new how much faster quad fire is with the 4 5870's than with 2 5970's? and by about how much percent?thank you for anyone who answers my question :)
     
  2. da_unique

    da_unique Member Guru

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    4x vs 2x, 4/2 = 2x
    So i think 2x as fast.
     
  3. MikeMK

    MikeMK Ancient Guru

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    No, it wont be 2x as fast, as the 5970 is already a dual GPU card based on underclocked 5870's.

    Theorectically quad 5970 should be a touch slower, and in the case of 2 card crossfire (2x 5870 vs. 1 5970 thats certainly the case). However, scaling isnt all that great once you get to 4 GPU's so i doubt there would be a huge difference in it except in benchmarks, and for the cost difference (based on UK prices) 2x 5970's would probably be cheaper.

    Might also be worth considering tri-fire with one 5970 + a 5870. Seen alot of people get decent results out of this and it seems to be a good balance.
     
  4. isidore

    isidore Ancient Guru

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    Last edited: Aug 1, 2010

  5. zoso_the_hippy

    zoso_the_hippy Master Guru

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    thanks guys=)
     
  6. Krogtheclown

    Krogtheclown Master Guru

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    Yea RE is one of the few game that Quad preforms well at, but your FPS are already so high it dosen't matter. Until they fix the drivers stick with TRI Xfire it performs much better and allot smoother. I got rid of my Quads in favor of Tri and couldn't be happier.
     
  7. evolucion888

    evolucion888 Master Guru

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    I think that the Tri setup is the best balance, both in SLI and CF, anything higher than Dual GPU's will result in diminishing gains.
     
  8. Jcazz

    Jcazz Master Guru

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    i would go for quad, but cpus, still suck need new arch for a real shine. But 4 5870...def better than 2 5970. independent pic-e lanes. better. period.
     
  9. Krogtheclown

    Krogtheclown Master Guru

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    If that where true then you would see more of an improvement the more you OC'd. But after bout 3.7 they just dont improve any at all.
     
  10. evolucion888

    evolucion888 Master Guru

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    I understand your point regarding processors, but I think that if we talk about PCI-E lanes, 2 HD 5970 will be more equiped with better bandwith for Inter GPU communication, why? Because 4 HD 5870 will share all the PCI-E bandwidth in the motherboard while an HD 5970, each videocard has its PCI-E bridge to communicate between their onboard GPU's which means that in a HD 5970 CF setup, GPU 1 will communicate to GPU 2 with its PCI-E bridge which will travel through PCI-E to communicate to GPU 3 which will communicate to GPU 4 or whatever their order is.

    But with 4 HD 5870, 1st card will have to travel through PCI-E lanes to communicate to the 2nd card which will communicate through another PCI-E lanes to the 3rd card blah blah yada yada, unless if the mobo can support more than 48 PCI-E lanes, it doesn't really help, plus the increased bus latency.
     

  11. Jcazz

    Jcazz Master Guru

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    thats why independent cards of the same gen compared to dual gpu cards of the same gen outperform them every time. :wanker:


    4 5870 > 2 5970....anyday.

    3 5870 > over 1 5970- 5870.


    you guys can say what you like. but cpu clock speed is still very important. if u dont/ cant obtain it, then dont even try those setups...lol 3.7ghz.....umm u can do that i will not.

    either bring next gen cpu arch, or clock high

    dual gpu setups were intended for people without SLI/CrossfireX boards first..

    Dual gpu CrossfireX was for people with only 2 way SLI/CrossfireX boards to get the performance on a non 3way 4 way SLI/CrossfireX boards


    if you have a 3way SLI/CrossfireX X58 mainboard, why on earth would you opt for 5970+5870 or 2 5970;s for that matter???

    either run 3 damn cards 5870-480 or get a 4 way sli/crossfirex board and run 4 5870 or 480;s.

    Gee....4way boards why would they make em? same with 3 way boards

    so u can run the cards in an independent config. BETTER performance. period.
     
  12. Jcazz

    Jcazz Master Guru

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    Then they should make Dual Core GPUS...or Quad core GPUS and forget about 2 GPUS on one PCB.
     
  13. LinkDrive

    LinkDrive Ancient Guru

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    Honestly, the difference in price and power consumption doesn't justify the difference in performance.

    4x HD5870 = 752w TDP
    2x HD5970 = 600w TDP

    4x HD5870 = $1560
    2x HD5970 = $1358

    The difference in performance is going to be roughly a 5% difference at best with so many GPUs scaling at the same time.
     
  14. Krogtheclown

    Krogtheclown Master Guru

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    Last edited: Aug 6, 2010
  15. Krogtheclown

    Krogtheclown Master Guru

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    i didn't think so.
     

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