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2 HD 5970's in XFire?

Hey guys,

how's everyone?

I currently got a single HD 5970 in my rig, but am thinking of adding another one in the future.
But I've heard they don't scale that great when in XFire, is that true? Does any of you guys happen to have two of these and could they tell me about their experience?
The next issue would be cooling these cards. I got a fully aircooled pc which cools perfectly fine with the single 5970. But will this be enough with the extra 5970 in it?
I got a Lian Li PC-P80 Armorsuit case which has 3 fans at the front side, directly blowing air to the area where the PCI-E lanes are located. Guess that should help a bit.... :bounce:
18 answers Last reply Best Answer
More about 5970 xfire
  1. I wouldn't be too concerned with cooling in your case, (lol), but quad HD 5970s just don't seem to scale too well, in some games it doesn't work. Some games show either no or little performance boost, others it scales well.
  2. Hello and welcome to the forums
    I agree with Lmeow, 2 HD 5970s don't scale very well.I have 1 HD 5970 and i am quite happy with its performance and don't see any reasons to upgrade now because it handle games fine.
    And as for the case,don't worry about it,just make sure you have an adequate PSU(if you want to CrossFire your 5970)
  3. Thanks for your replies guys.
    Yeah now I'm happy with it performance too, but in a year/year and a half or so I might want to add the extra card.
    The PSU is a Be Quiet! 1200Watt, that should be sufficient. :)
  4. Yes that's enough for 2 5970s,i hope they scale better with newer drivers.
  5. If you want more performance then you could add a HD5850 or HD5870 to your 5970 for some Tri-Fire goodness, Tri-fire scales much better than quadfire.
  6. Also, you shouldn't really be worried that games wont run that well in a year's time. Until they release the new consoles, almost all new games will be graphically grounded at the current level. Designers aren't gonna give the PC <substantially> better graphics, so your 5970 should last you another couple of years. Sony said that the earliest release for a new PS console is late 2013/2014.
  7. why would you need another 5970 anyway?... Its the best dual GPU on the market
  8. Upgrading my system is also a bit of a hobby. ;-)
    And omgitsfatal, did you mean these cards would scale better as in give the absolute result a better outcome or better value for money? The later seems understandable.
  9. And I do have a i7 980X and the same motherboard as you actually PSD... :lol:
  10. why do you need this much power ?
  11. Best answer
    RobBosman said:
    Upgrading my system is also a bit of a hobby. ;-)
    And omgitsfatal, did you mean these cards would scale better as in give the absolute result a better outcome or better value for money? The later seems understandable.


    What I mean is quadfire doesnt work well, so your paying £500 for £300 worth of performance.

    Get a HD5870 for Tri-Fire as its much better value and should give very similar performance as adding a second HD5970 would.
  12. yeah , go tri fire . quad fire would dissappoint you with scaling issues .
  13. Alright, thanks guys. :)
  14. I wouldn't recommend tri-fire, because you already have a 5970, so selling it and getting 3 5870s't doesn't make much sense,so keep it for now and upgrade when necessary
  15. Maziar said:
    I wouldn't recommend tri-fire, because you already have a 5970, so selling it and getting 3 5870s't doesn't make much sense,so keep it for now and upgrade when necessary


    He doesnt have to sell the 5970 in order to add another 5870 because the 5970 is based on a slightly downclocked pair of 5870s to begin with, so he can downclock the new 5870 to 5970 levels and they would be recognized as tri-fired cards.
  16. I see.
    Yes a 5870 can be down clocked in order to work with a 5970, but there may be some instability issues, however I agree that its a good cost-effective option(compared to adding another 5970)
  17. Many people have done it and reported good results, you could also use a HD5850 with a HD5970 if you wanted.
  18. Best answer selected by RobBosman.
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