Ati radeon 5870's crossfire lag

hi everyone !

My problem i am facing now is that i was using one ati 5870 for like 3 dayz and was playing bf3 and far cry 3 on ultra with no problem. Then i got a 2nd one and put it in crossfire and now i have a lag going on. It is a slight lag when i move fast on drive a car in far cry for instance. This is really bugging me since i was hoping for a beter FPS and performence, not for a lag.

Hope you can help me.

Best regards
15 answers Last reply
More about radeon 5870 crossfire
  1. Sounds like a micro stutter issue Do you have the latest drivers? Try the beta ones and see if it helps.

    Also what motherboard are you using?
  2. what is your CPU? dual core or old quad core processors aren't fast enough to run 5870 crossfire,crossfire and sli don't share VRAM so 2X5870 1GB crossfire are not 2GB it's effectively 1GB which is bottleneck in some games with maxedout settings.
  3. I am not home right now but ill send you guys all my spec's tomorrow

    I know it is a xeon Quad core prossesor should be a server prossesor
    i have 12GB ram and an assus moderboard

    The weird thing is that i could run the games maxed out on one card and it has a small lag on 2 in crossfire.

    Thanks
  4. I go for drivers, try to update them like Azn Cracker said :)
  5. I think i have the newest ones tough i onley have the pc for like 6 days and got it from the amd catalyst center if i am not wrong
  6. Azn Cracker said:
    Sounds like a micro stutter issue Do you have the latest drivers? Try the beta ones and see if it helps.

    Also what motherboard are you using?

    I think i have the newest ones tough i onley have the pc for like 6 days and got it from the amd catalyst center if i am not wrong
  7. oxford373 said:
    what is your CPU? dual core or old quad core processors aren't fast enough to run 5870 crossfire,crossfire and sli don't share VRAM so 2X5870 1GB crossfire are not 2GB it's effectively 1GB which is bottleneck in some games with maxedout settings.

    Intel(R) Xeon(R) CPU E5504 @ 2.00GHz (4 CPUs), ~2.0GHz
  8. your processor is underclocked version of i7-920 which isn't fast enough to feed crossfire,single 5870 is faster than 2X5870 crossfire with that CPU,your processor socket is LGA1366 and these processors are out of production almost tow years ago so it is hard to find new one,I suggest to use single 5870 with that CPU,or if you still want to run 5870 CF then get a new Z77 motherboard with ivy-bridge core i5 CPU.
  9. oxford373 said:
    your processor is underclocked version of i7-920 which isn't fast enough to feed crossfire,single 5870 is faster than 2X5870 crossfire with that CPU,your processor socket is LGA1366 and these processors are out of production almost tow years ago so it is hard to find new one,I suggest to use single 5870 with that CPU,or if you still want to run 5870 CF then get a new Z77 motherboard with ivy-bridge core i5 CPU.

    If ir is an onderclocked version then i could just overclock it right , so this cpu is years old minimum ?
  10. so this cpu is minimum 2 years old ?
  11. oxford373 said:
    your processor is underclocked version of i7-920 which isn't fast enough to feed crossfire,single 5870 is faster than 2X5870 crossfire with that CPU,your processor socket is LGA1366 and these processors are out of production almost tow years ago so it is hard to find new one,I suggest to use single 5870 with that CPU,or if you still want to run 5870 CF then get a new Z77 motherboard with ivy-bridge core i5 CPU.

    how about a intel Core i7-3770K with a asus sabertooth z77
  12. your processor problem isn't because it's old but because it is slowish quad core processor ,some xeon processors are lower clocked than desktop versions and these processors aren't suitable for gaming and general purpose ,I'm not sure if all XEON processors can be overclocked but tom's hardware overclocked one in this article. http://www.tomshardware.com/reviews/xeon-e5620-overclocking-westmere-ep,2767-2.html
    if it is possible to overclock yours, try to overclock it to 3.0GHz if you know how to do that.
    if you want to buy a new motherboard and CPU this what I would buy.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16819116782
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
    core i7-3770 overkill for gaming, the main difference between core i7 and core i5 is hyper threading which allow every physical core to handle tow threads and most games don't use more than 4cores/threads,actually some games are a little bit faster with hyper threading disabled on core i7s.
    btw your problem happened to many other people before.
    http://forums.anandtech.com/archive/index.php/t-2253266.html
    http://www.tomshardware.com/forum/314201-33-crossfire-slower-games-without
    and sorry about my bad english,I'm not speaking english natively.
  13. oxford373 said:
    your processor problem isn't because it's old but because it is slowish quad core processor ,some xeon processors are lower clocked than desktop versions and these processors aren't suitable for gaming and general purpose ,I'm not sure if all XEON processors can be overclocked but tom's hardware overclocked one in this article. http://www.tomshardware.com/reviews/xeon-e5620-overclocking-westmere-ep,2767-2.html
    if it is possible to overclock yours, try to overclock it to 3.0GHz if you know how to do that.
    if you want to buy a new motherboard and CPU this what I would buy.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16819116782
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
    core i7-3770 overkill for gaming, the main difference between core i7 and core i5 is hyper threading which allow every physical core to handle tow threads and most games don't use more than 4cores/threads,actually some games are a little bit faster with hyper threading disabled on core i7s.
    btw your problem happened to many other people before.
    http://forums.anandtech.com/archive/index.php/t-2253266.html
    http://www.tomshardware.com/forum/314201-33-crossfire-slower-games-without
    and sorry about my bad english,I'm not speaking english natively.


    Your english is not that bad , I don't speak english also.
    I recently discovered i have an "Asus se 6" moderboard.
    How about i would just get an i7 985x and put it in mine.
    And yeah i love overkill i do not know why but i do. I will also be running an
    minecraft server so yeah i would get the i7-3770 just becouse i would have a great cpu
    for a long time. So the general thing is i need a cpu wich is a quad core and minimum 3GHZ to run
    these cards in crosfire ?
  14. oxford373 said:
    your processor problem isn't because it's old but because it is slowish quad core processor ,some xeon processors are lower clocked than desktop versions and these processors aren't suitable for gaming and general purpose ,I'm not sure if all XEON processors can be overclocked but tom's hardware overclocked one in this article. http://www.tomshardware.com/reviews/xeon-e5620-overclocking-westmere-ep,2767-2.html
    if it is possible to overclock yours, try to overclock it to 3.0GHz if you know how to do that.
    if you want to buy a new motherboard and CPU this what I would buy.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16819116782
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
    core i7-3770 overkill for gaming, the main difference between core i7 and core i5 is hyper threading which allow every physical core to handle tow threads and most games don't use more than 4cores/threads,actually some games are a little bit faster with hyper threading disabled on core i7s.
    btw your problem happened to many other people before.
    http://forums.anandtech.com/archive/index.php/t-2253266.html
    http://www.tomshardware.com/forum/314201-33-crossfire-slower-games-without
    and sorry about my bad english,I'm not speaking english natively.

    I wound have to change out my motherboard and ram if i buy a i7 920 but would this be fast enough ?
    thanks for the info
  15. oxford373 said:
    your processor problem isn't because it's old but because it is slowish quad core processor ,some xeon processors are lower clocked than desktop versions and these processors aren't suitable for gaming and general purpose ,I'm not sure if all XEON processors can be overclocked but tom's hardware overclocked one in this article. http://www.tomshardware.com/reviews/xeon-e5620-overclocking-westmere-ep,2767-2.html
    if it is possible to overclock yours, try to overclock it to 3.0GHz if you know how to do that.
    if you want to buy a new motherboard and CPU this what I would buy.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16819116782
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
    core i7-3770 overkill for gaming, the main difference between core i7 and core i5 is hyper threading which allow every physical core to handle tow threads and most games don't use more than 4cores/threads,actually some games are a little bit faster with hyper threading disabled on core i7s.
    btw your problem happened to many other people before.
    http://forums.anandtech.com/archive/index.php/t-2253266.html
    http://www.tomshardware.com/forum/314201-33-crossfire-slower-games-without
    and sorry about my bad english,I'm not speaking english natively.


    Do you know a cpu wich will be good enough for all gammes and run these 2 GPU's crossfire on an "Asus se 6" moderboard
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