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Crossfire 5770's worse then single 5770?

I have crossfire 5770's I have the latest profiles and drivers yet MW2, Black Ops, F1 2010, iracing are all getting better frame rates with crossfire disabled then enabled. Any suggestions on what may be the problem?

I have the latest ATI drivers (10.12) and profiles.

System Specs-
Processor:
AMD 2.6 Quad Core 9950 (Black edition running at 3.0 Ghz)
Memory:
OCZ High Performance DDR2 PC2 8500 (4 GB)
Hard Drive:
Western Digital 500GB
Video Card:
CrossFire XFX 5770s
Monitor:
19.5" Samsung
Sound Card:
Onboard.
Operating System:
Windows 7 Ultimate 64 Bit
Motherboard:
Biostar TA790GX 128M
Power Supply:
NZXT PP-600
And of course two 5770s.
21 answers Last reply Best Answer
More about crossfire 5770 worse single 5770
  1. I have read reviews where they show lower fps in crossfire on a very few games. I do not know the titles or if this is your issue. If it were my rig I would download and run furmark and the dx11 heaven benchmark programs in xfire and single card profile, maybe 3dmark too and see what those benchmarks tell you. If you're showing lower performance in those Iin xfire I would start to wonder about the pcie lanes or a video card being defective. Have you tried running one card only in they system and benching it, then trying the other? Or switching the cards pcie lanes?
  2. Like g048989h said, some games don't work well with crossfire/sli.

    However, sometimes this issue is just lacking the crossfire profiles.

    The crossfire profiles can be found here: http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx
  3. i would do some testing with the crossfire bridges, some systems need 2 for optimum performance or else it performs very badly, some systems work better with one and occasionally youll find a system that doesnt see any benefit with the bridges at all
  4. I'll do some testing with furmark and 3dmark and report back.

    As I said I have the latest profiles... Thanks anyway bystander.
    And I am playing GTA IV, COD4, MW2, Black Ops, F1 2010, iracing.. and so on.


    CH_Gamer what do you mean 2 bridges? I only have one slot on each card for the bridge so I dont see how I would install two. And from what i have red they get an increase of about 2 fps.. Doesn't seem like anything to worry about.
  5. Well I ran Furmark and this is what I got:

    With crossfire: 4438
    With Crossfire Disabled: 4441

    What gives?
  6. Just to see if the new card may be back i took out the old one and used the new one and got the same FurMark score and fps in games so its fine..

    Any ideas? ugh
  7. well, something is not right. Try completely uninstall all ati drivers, try driversweeper, then reinstall again. i just looked at the xfx site http://xfxforce.com/en-us/products/graphiccards/hd%205000series/5770.aspx?lang=en-us and there seems to be 2 different models, 1 with 2 bridge conectors and the other has only 1, which is odd, i thought they all had 2 so you could run up to 4 cards....
  8. Aint that motherboard the model that also support hybrid crossfire?.

    If so you may want to make sure your onboard video is disabled and that you arent running hybride cross-fire instead of true crossfire
  9. iam2thecrowe said:
    well, something is not right. Try completely uninstall all ati drivers, try driversweeper, then reinstall again. i just looked at the xfx site http://xfxforce.com/en-us/products/graphiccards/hd%205000series/5770.aspx?lang=en-us and there seems to be 2 different models, 1 with 2 bridge conectors and the other has only 1, which is odd, i thought they all had 2 so you could run up to 4 cards....

    I have uninstalled and reinstalled every driver, profile, and CCC since 10.5 so that is NOT the issue lol.

    Ya it does seem like there are two different models but my motherboard only has two slots so i'm ok with it.
  10. lafontma said:
    Aint that motherboard the model that also support hybrid crossfire?.

    If so you may want to make sure your onboard video is disabled and that you arent running hybride cross-fire instead of true crossfire


    It does, I guess Ill have to go looking around the Bios and see what I can find. Any ideas on how what I'll need to do?

    My 1000 Watt PSU comes in tomorrow so power shouldn't be the problem (not that 600 watts wasn't enough according to my Kill-A-Watt).
  11. Best answer
    I like what lafontma said. What if you are running in hybrid, then you'd be using one card and onboard rather than the two cards. I would get into the BIOS and make sure onboard is disabled. Refer to your MB book if you're unsure as where to go, but it should be really easy to find and check the setting.
    Also, what about a faulty xfire bridge?
  12. THe motherboard says nothing about it.
    And the on-board is a 3 Series.. So the 5770 couldn't work with it anyway.


    Will check after I finish installing this 1000 Watt PSU.
  13. Well I disabled the onboard and it didn't seem to affect it.

    It seems that the cards are running at:
    PCI-E x8 v2.0 and PCI-E x8 v1.1 Could this be a problem, or show my stats sound right?

    It seems my Mobo only supports x8 in Crossfire.
  14. The 2nd card running at x8 v1.1 is like using a x4 slot in throughput. That could definately effect performance. Although it shouldn't make it slower than a single card, but it definately would not perform as fast as it should.
  15. There are might be some problems with the new driver 10.12. so downgrade the driver and see what happens. And with F1 there is crossfire issue not even HD5970 is getting better fps it is just barely passing HD6870.

    Or you can uninstall the driver clean the registry and then install the driver again.
    This might help .
  16. bystander said:
    The 2nd card running at x8 v1.1 is like using a x4 slot in throughput. That could definately effect performance. Although it shouldn't make it slower than a single card, but it definately would not perform as fast as it should.

    Is there anyway to fix this?
  17. fshaharyar said:
    There are might be some problems with the new driver 10.12. so downgrade the driver and see what happens. And with F1 there is crossfire issue not even HD5970 is getting better fps it is just barely passing HD6870.

    Or you can uninstall the driver clean the registry and then install the driver again.
    This might help .

    As I said i have tried every driver/CCC back since 10.5 :sarcastic:
  18. So after taking some of what lafontma and g048989h had to say heres what I came up with:

    Furmark score with Crossfire disabled: 4308 points
    Furmark score with Crossfire Enabled: 7845 points
    (running the same settings of course).

    Made a few changes in the Bios but thanks a bunch.


    One last question how hot can a 5770 get without damage? I may need to adjust the fans as within the end of the testing they were running about 65C.
  19. Best answer selected by Dokioto.
  20. After a quick search seems my temps are fine with the amount of load Furark puts on a card.

    Thanks everyone, Happy holidays
  21. This topic has been closed by Mousemonkey
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