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crossfire 2x6970 or 1 7970?

Discussion in 'AMD / ATI' started by tilldeath, Jan 9, 2012.

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  1. radrok

    radrok

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    This, I strongly HOPE that NVIDIA's offering will let us reach that kind of performance.
    7970 is good but it's not strong enough, even OCed
     
  2. erocker

    erocker Senior Moderator Staff Member

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    Your numbers are all fine and good in theory. Most of the time these are people who have used CrossFire and dont want to deal with the issues that comes with CrossFire. I've seen plenty of reasonable arguments in favor of the 7970, perhaps you just need to actually read the posts?
     
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  3. Artas1984

    Artas1984

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    My biggest argument towards CrossFire HD7970 is the price difference - HD7970 is about 90 % more expensive than single HD6970, but boosts only 33 to 50 % more performance. Anybody come deny that! So now we are not talking about CrossFire - just single card deal.

    Also, what about that XDRAM? Where is it? I don't see any "revolution" incorporated with HD7970 whatsoever.

    Even better argument - CrossFire HD6870 will be equal, if not better, than HD7970 in performance, and will cost 80 % less. Nobody can deny that!!!
     
    Last edited by a moderator: Jan 17, 2012
  4. cadaveca

    cadaveca My name is Dave

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    Thread title = 2x 6970 vs 1x 7970? Let's discuss JUST that, mkay? Of course there are other options..nV cards, too.

    I'd gladly trade my dual 6950 2GB cards for a 7970. Erocker has done the same, but he had 1GB cards.

    Opinions from actual users of a product tend to reflect things that might not be the same as popular opinion. Oh well.

    Crossfire has problems, very frustrating problems, and many users who actually use Crossfire agree on this point alone. Most will also say that regardless of cost, avoiding Crossfire will just plain make your computing experience BETTER, because of the lack of problems getting both cards working right.

    Having used Crossfire since it was released to the public, in all it's forms over the years, I sitl lrecommend users avoid Crossfire, unless the perforamcne they require to push their monitors requires a differnt solution than a single VGA.
     
    Last edited: Jan 17, 2012
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  5. radrok

    radrok

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    You are directly comparing GCN shaders to VLIW4 shaders, which isn't the proper right thing to do.
    The GDDR5 with wider bus they implemented is more than enough to feed data to the GPU so there is no need for XDR2.

    Having said so, the investment on the 6970 is a bad deal because it's an older generation card and drivers will probably be better and more optimized for the new 7k series, can't argue with that sorry, we've already seen AMD prefer their latest gen when it had to develop drivers.
    Example given : take a look at what happened on Skyrim, HD 58XX users had to wait some days more than 69XX/68XX users to have CFX scaling.

    You clearly don't understand that single GPU is king, even if it delivers 15% less performance, I'd rather choose a single strong GPU than a couple GPUs.
    CFX/SLI bring microstuttering to the party under 60 FPS, and you can't avoid it, I can tell you that there is and the game is smoother under 60 FPS with a single card.

    This is why I'm going to dump my HD 6990 CFX for the fastest single GPU be it 7970 or the next NVIDIA's offering, too much hassle and the expected performance isn't there, even if in theory should be there, trust me.

    cadaveca, my setup has given me nightmares, literally.
     
  6. bostonbuddy New Member

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    are you buying a second 6970 or starting from scratch.
    If you have one its a toss up, altho I'd lean towards trying to sell it and get a 7970.
    If your starting from scratch def 7970.
     
  7. Ginnoskie

    Ginnoskie

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    +1 to you!! :rockout:
     
  8. gaff3rp New Member

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    I am running a dell u2711 on a single 6970 and in bf3 it struggles, so am faced with the same upgrade dilemma. With the added bonus of a $100 water block for my gfx that is not transferable to 7 series.
    I think waiting until the 7990 and nvidia's new range hit the market before doing anything as price cannot be justified for meagre gains or added hassles with either upgrade currently.

    As for the framerate/benchmark scores, i think min, med and max frames as brackets with a percentage of time in each would be an interesting way to display results. eg..

    Min Med/Av Max
    (50%) (40%) (10%) perhaps coloured bar from red-yellow-green?
    25 30 65
    Note all numbers here were just made up to illustrate a point, not actually calculated in any way.
     
  9. Live OR Die

    Live OR Die

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    ATI 1900xt will do ya fine
     
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  10. thematrix606

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    To all that recommend xfire, or see no difference in FPS drop: it's called microstutter, read up on it. Yes, you have microstutter on a single card as well, but it's worse in xfire or sli.
     
  11. Spaceman Spiff

    Spaceman Spiff

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    Microstutter is fixable. I'd suggested reading as well.
    If you already have a 6970 I'd get another one. I got my 2nd one for less than 250. If you do not then begin with a 7970 and add another as needed down the road.

    There's no denying that there CAN be issues with crossfire. Most can be resolved, the rest can be dealt with by deactivating a card. Unless you are trying to get 250+ fps in 6+ year old games.

    Or I'm just the luckiest multi card user ever.
     
    Last edited: Feb 23, 2012
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  12. thematrix606

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    How, and source?

    I was referring to http://techreport.com/articles.x/21516
    Mainly individual frame time.

    As can be seen here:

    [​IMG]
    vs
    [​IMG]
    vs the green goblin
    [​IMG]
    And another graph
    [​IMG]
    MMkay. Notice the difference? Ok then.
     
  13. crazyeyesreaper

    crazyeyesreaper Chief Broken Rig

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    7970 hands down

    ive had

    4870 xfire
    5850 xfire
    6950 2GB xfire
    6970 xfire

    and i sold out and am going 7970,

    in the majority of games ive played dual gpus offer a higher average frame rate sure, but in MOST titles minimum FPS has been SLOWER then a single gpu,

    now if a 7970 is avg 70 vs 6970s avg of 90 but the minimum fps is 45 on the 7970 vs 25 on the 6970s guess which setup feels better 9 times out of 10,

    I dont care what bullshit numbers people want to pull its only PART OF THE EQUATION!

    Im an FPS whore, the more the better especially in first person shooters like Bad Company 2 and Battlefield 3, where anyone whos gamed with me, from my 5850 to 6970 xfire setups the performance change from that and from switching from AMD to Intel cpu, showed an immediate improvement in my performance in game, in terms of score per minute K/D you name it, so ive always wanted more FPS till i hit my sweet spot.

    Now while the above is true in shooters, ive noticed in games like Skryim, Fallout New Vegas, Last Remnant, Singularity, and others, that there would be rendering issues with multi gpu or other issues

    for Skyrim and New Vegas it was 0 scaling
    for last Remnant / Singularity / bulletstorm it was rendering issue,

    etc etc, of anyone in this thread ive changed gpus probably more often and gone dual gpu out the gate on release day for each gen,

    I say right now, 2x 6970s are WORSE then 1x 7970 in the majority of games due to how the game feels in terms of responsiveness,

    and considering BF3 had an update that gave most 7900 series users a nice fat 15-20% performance bump, the crossfire 6970s dont even stand a chance anymore,

    now if we look here and add 15% - 20% to the 7970s FPS here we see the 7970 boost to 71-74 fps essentially exact same performance as the 6990 and this is before adding one of those nice monstrous overclocks
    now add in a 16% overclock w1zzard managed on his sample giving an average of 14% more performance add another 14% on top of that base 62 thats another 8 fps bring the 7970 up to 79-82 FPS lulz

    [​IMG]
     
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  14. Outback Bronze

    Outback Bronze

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    Ok dude i have 6970 xfire. How come i dont see mico stutteringv while playing? Not one bit? These r what? graphs? :confused:
     
  15. thematrix606

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    Thanks, you made my day.

    So because you don't pay attention or can't recognize it, it does not exist? Why, sun light must be tricky for you to understand or prove, then.

    Read the article, it explains enough, I'm not going to summarize it for you.
     
  16. Outback Bronze

    Outback Bronze

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    Dont need 2 bud!
     
  17. crazyeyesreaper

    crazyeyesreaper Chief Broken Rig

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    yea couldnt help myself

    point remains, crossfire does have an impact on how responsive controls feel, as noticed by cadaveca and myself in some titles
    and it doesnt change the fact, that the majority of the most popular games see next to no improvement with crossfire,

    Skyrim was the fastest selling game in Steams history still doesnt like crossfire that much, and even if it did, pushing more then 60fps breaks the games physics engine lulz

    but again i needed more FPS in Battlefield Bad Company 2 to enjoy the game, aka crossfire was mandatory for me, where as for cadaveca it created input lag and caused him to have issues enjoying the game, there are always more sides to the argument then just pure frame rate.

    Another game that doesnt tell the whole story, Total War: Shogun 2, dual gpus spank that game in frame rate but nobody tells you the main campaign map stutters like a motherfucker with multi gpus.

    heres the kicker

    Skyrim = fastest selling game in steam history, crossfire was a giant waste on this title,

    Total War: Shogun 2 = best RTS game of the year and an AMD sponsered game Multi GPU tech is great in terms of scaling and was of a nice benefit in battles, sadly campaign map where you spend 90% of your time stutters like crazy

    Bulletstorm: rendering issues

    RAGE: performance and rendering issues

    i can keep adding more if people like :roll:

    I use crossfire with every generation of GPUs and while i enjoy the performance it brings even I am not stupid enough to turn a blind eye to the problems it brings
     
    Last edited: Feb 23, 2012
  18. thematrix606

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    So you're just trolling?

    Look, if you can't tell the difference between 30, 60 or 120 fps on your screen, you most likely WON'T notice any micro stuttering.

    So it's either your eyes/brain that cannot distinguish a clear difference, or your monitor slows it all down or smooths it out.

    As he said, there is a difference, you just have to be able to see it.
     
  19. crazyeyesreaper

    crazyeyesreaper Chief Broken Rig

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    interesting point everyone gets fast reponse time monitors aka 2-5ms, on these super fast refresh rates stuttering seems to be more common occurance,

    finding a monitor that offers the slowest response time possible without causing ghosting, tends to be better for multi gpu setup, as the slower response time tends to help mitigate the jittery frames.

    another interesting fact is 3 gpus in Xfire tends to be better then 2 gpus as the 3rd gpu for whatever reason removes the stuttering from off sync frame times,

    funny enough i sold both my 6950 2GB gpus and the games that came with them so my 7970 is a side grade with no hassels from multi gpu for awhile..... untill i buy a second 7970.
     
  20. Outback Bronze

    Outback Bronze

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    Im not trolling dude im just stating a fact ive seen with my own two eyes. U must be rorbcop to b able to determine the difference. I cant, i have a 2ms screen locked at 60 fps. Huhhh? Micro stuttering?
     
  21. yangwangbrock

    yangwangbrock New Member

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    Crossfire made a night and day difference for me for BF3 eyefinity @ 5760 x 1200, as opposed to only one 6970. Even with 6970 Crossfire I still couldn't play at everything maxed out - not sure how 7970 holds up.
     
  22. xenocide

    xenocide

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    I recommend a single card setup whenever possible. The single 7970 is definitely better--for a number of reasons really. For starters, as crazyeye posted, Crossfire tends to still have a number of issues. Titles at launch 95% of the time don't support it properly (BF3 was the only exception in recent memory where it ran good at launch. I have a friend with a 6850 Xfire setup and he is hellbent on getting a single card next time around because of the frustrations he's had with Crossfire Profiles and Drivers. As if that were's enough, the 7xxx series is destined to get a number of flat performance increases as drivers mature, but the 6xxx series has pretty much hit the wall--sans a few game-specific performance boosts.
     
  23. erocker

    erocker Senior Moderator Staff Member

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    OP bought a 7950. Thread closed.
     
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