1. Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

AMD Radeon HD 6870 CrossFire

Discussion in 'Reviews' started by W1zzard, Oct 21, 2010.

  1. CDdude55

    CDdude55 Crazy 4 TPU!!!

    Joined:
    Jul 12, 2007
    Messages:
    8,179 (3.18/day)
    Thanks Received:
    1,277
    Location:
    Virginia
    Some people can actually see a pretty significant difference from going above 60 frames, though i have yet to see it..
  2. bear jesus

    bear jesus New Member

    Joined:
    Aug 12, 2010
    Messages:
    1,535 (1.06/day)
    Thanks Received:
    200
    Location:
    Britland
    To me it's about the frame rate drops, if the average is above 60 that's great but if it drops down to like 20fps during cirtain parts of a game then it really messes with the experiance.
    As most sites give the average fps the higher the better as it lowers the chance of getting annoying fps drops.
  3. jasper1605

    Joined:
    Nov 6, 2009
    Messages:
    1,271 (0.74/day)
    Thanks Received:
    228
    Location:
    Ohio
    fixed it for ya :)

    edit: good call bear. Didn't think of it that way.
    N3M3515 and CDdude55 say thanks.
  4. n-ster

    Joined:
    Jan 11, 2009
    Messages:
    8,858 (4.39/day)
    Thanks Received:
    1,405
    minimum fps is what is important
    johnnyfiive and CDdude55 say thanks.
  5. jasper1605

    Joined:
    Nov 6, 2009
    Messages:
    1,271 (0.74/day)
    Thanks Received:
    228
    Location:
    Ohio
    indeed. like when my ps3 drops to about 8 fps on super star dust hd in the 3d mode after beating the final planet. I had a lol when I saw how slow it got :laugh:
  6. nt300

    nt300

    Joined:
    Jan 20, 2010
    Messages:
    868 (0.53/day)
    Thanks Received:
    159
    Location:
    Toronto, ON. Canada
    Benchmark results are very similar to other review sites, Good Job Wiz, and super fast HD 6870 Crossfire performance, better than HD 5970 monster too :D
  7. Tatty_One

    Tatty_One Senior Moderator Staff Member

    Joined:
    Jan 18, 2006
    Messages:
    16,403 (5.28/day)
    Thanks Received:
    2,339
    Location:
    Worcestershire, UK
    Lol, near perfect at 52% at 19XX res?, try half perfect, or 20% less than GTX460's at the same res (72%). I love the performance figures, especially for some reason with the HD 6850's in crossfire, however I fundemenatally have an issue with any setup that in effect means I flush 48% of the value of the 2nd card down the toilet.
  8. bear jesus

    bear jesus New Member

    Joined:
    Aug 12, 2010
    Messages:
    1,535 (1.06/day)
    Thanks Received:
    200
    Location:
    Britland
    I think he is refering to the fact that multiple games get 100% scaling and other are at 80/90%+

    Really the scaling percentage at the end of the review seams to be much lower than what would be expected when looking at the frame rate increase it gets with most games.
    In the 6850 crossfire review comments thread it's been pointed out that the scaling percentage of the games does not match up to the ingame numbers, i really have to wonder how the end percentage is worked out for it to be so much lower than expected when multiple games get upto 90 to 100% scaling
  9. bear jesus

    bear jesus New Member

    Joined:
    Aug 12, 2010
    Messages:
    1,535 (1.06/day)
    Thanks Received:
    200
    Location:
    Britland
    Also zero wing did the same for the 6850 review thread, his results are whats quoted below.

    "Scaling boost with Games (no Bench) @ 1920x1200 in crossfire 2 x 6850 config, (excluding call of juarez 2 for relevant driver issue) is +84,12%!

    Scaling Boost including everything: Games,Bench, and also Call of Juarez 2, is: +75,8%"

    I fail at working out percentages when it comes to something like this thus why i have not done it myself but it seams that either the numbers on both reviews or wrong or everyone is missing something that was included in the reviews that caused the numbers to be so much lower.

    *edit*
    i'm assumig the point still stands when you are done panther :p
    Last edited: Oct 27, 2010
  10. pantherx12

    pantherx12 New Member

    Joined:
    Jan 2, 2009
    Messages:
    9,714 (4.79/day)
    Thanks Received:
    1,699
    Location:
    ENGLAND-LAND-LAND
    Sorry for deleting my post, realised I messed up quite badly in a few places,was doing the maths last night as I was falling asleep lol

    Gime 10mins and accurate figures will be up.
  11. HTC

    HTC

    Joined:
    Apr 1, 2008
    Messages:
    2,237 (0.97/day)
    Thanks Received:
    302
    With the 6850, it was pointed out the 19XX res numbers were off, by quite a bit. Let's see if i can add it up:

    [​IMG]

    97.4% increase here.

    [​IMG]

    89.8% here.

    [​IMG]

    99% here.

    [​IMG]

    83.5% here.

    [​IMG]

    -2% here: this game clearly doesn't scale @ all.

    [​IMG]

    96.6% here.

    [​IMG]

    80.5% here.

    [​IMG]

    79.2% here.

    [​IMG]

    100.9% here.

    [​IMG]

    97.5% here.

    [​IMG]

    84.6% here.

    [​IMG]

    88.2% here.

    [​IMG]

    70.9% here.

    [​IMG]

    16% only here.

    [​IMG]

    52.4% here.

    [​IMG]

    45.5% here.


    Does this not add up to 73.5%, including Call of Juarez 2? 78.5% if not.

    [​IMG]

    Dunno where that 52% came up from but it seems that W1zz's math has had some problems: that or my math sucks.


    EDIT

    Adding remaining benches to the calculations:

    [​IMG]

    90.7% here.

    [​IMG]

    21.1% here.

    [​IMG]

    22.1% here.

    [​IMG]

    99.3% here.

    All benches included, i get an average of 70.7%.
    Last edited: Oct 29, 2010
  12. pantherx12

    pantherx12 New Member

    Joined:
    Jan 2, 2009
    Messages:
    9,714 (4.79/day)
    Thanks Received:
    1,699
    Location:
    ENGLAND-LAND-LAND
    I Can't be bothered correcting this entire post, see correct numbers here AMD Radeon HD 6870 CrossFire and
    here if you want 3dmark/unigine added to my calculations AMD Radeon HD 6870 CrossFire


    Here's my numbers corrected
    27.1 - 53.5 AVP 97.41% scaling
    52.9 - 100.4 BF:BC 89.79% scaling
    42.7 - 85.0 Battleforge 99.06% scaling
    115.8 - 212.5 COD4 83.50% scaling
    30 - 59 Crysis 96.66% scaling
    112.9 - 203.8 DAWN of war 2 80.51% scaling
    84.1 - 150.7 dirt 2 79.19% scaling
    67.9 - 136.4 farcry 2 100.88% scaling
    99.1 - 195.7 HAWX 97.47% scaling
    20.1 - 47.1 metro2033 134.32% scaling
    55.7 - 104.8 Riddick 88.15% scaling
    41.3 - 70.6 stalker cs 70.94% scaling
    148.2 - 225.9 UT3 52.42 scaling
    67.7 - 98.5 wow 45.49% scaling

    81.2 - 94.3 sucom 2 16.13% scaling
    96.3 -98.3 COJ2 2.07% scaling

    Will confirm average in just a moment : ]

    Average excluding sucom2 and COJ2 86.842%

    77.12% scaling including the them.


    Also if you exclude UT3 and WOW ( tbh honest, why are these games in a crossfire review? lol)

    93.15% scaling.


    Just in-case I messed up again I used this tool http://www.csgnetwork.com/averagecalc.html and this one http://www.onlineconversion.com/percentcalc.htm to triple check everything.


    Correct me if wrong of course!


    Does seem wizz's graph is wrong though eh.
    Last edited: Oct 27, 2010
  13. HTC

    HTC

    Joined:
    Apr 1, 2008
    Messages:
    2,237 (0.97/day)
    Thanks Received:
    302
    The one i marked out is wrong: it's 20.1 to 37.1 FPS.
  14. bear jesus

    bear jesus New Member

    Joined:
    Aug 12, 2010
    Messages:
    1,535 (1.06/day)
    Thanks Received:
    200
    Location:
    Britland
    The increases within the benchmarks are what got me to order a pair of 6870's (arriving on friday :D) if i had only looked at the scaling resluts at the end i would have never once even considered crossfire.

    I really want to know why the reviews have it so much lower than everyone is working out, is there something included in the review that everyone is missing?
  15. HTC

    HTC

    Joined:
    Apr 1, 2008
    Messages:
    2,237 (0.97/day)
    Thanks Received:
    302
    Dunno, really: maybe we're doing it wrong? My math skills aren't very good but i think i did this particular math properly.
  16. bear jesus

    bear jesus New Member

    Joined:
    Aug 12, 2010
    Messages:
    1,535 (1.06/day)
    Thanks Received:
    200
    Location:
    Britland
    I really don't expect w1zzard to have got something wrong thus why i want to know if we are all missing something as multiple people are all working the numbers out to be higher than is listed on the scaling page of the review.
  17. pantherx12

    pantherx12 New Member

    Joined:
    Jan 2, 2009
    Messages:
    9,714 (4.79/day)
    Thanks Received:
    1,699
    Location:
    ENGLAND-LAND-LAND
    cheers for pointing that out, must of typod whilst editing and missed it.
    we working things out then :p lol


    Okay with that in mind, excluding the games that don't scale well ( ut3 and below)
    89.01% scaling
    with wow/ut3 83.28 % scaling

    Including all games 74.015% scaling.
    Last edited: Oct 29, 2010
  18. HTC

    HTC

    Joined:
    Apr 1, 2008
    Messages:
    2,237 (0.97/day)
    Thanks Received:
    302
    No prob.

    Just thought of something: what if he's including the 3DMark benches in his average increases?
  19. pantherx12

    pantherx12 New Member

    Joined:
    Jan 2, 2009
    Messages:
    9,714 (4.79/day)
    Thanks Received:
    1,699
    Location:
    ENGLAND-LAND-LAND


    Adding that to calculations now : ]
    HTC says thanks.
  20. Tatty_One

    Tatty_One Senior Moderator Staff Member

    Joined:
    Jan 18, 2006
    Messages:
    16,403 (5.28/day)
    Thanks Received:
    2,339
    Location:
    Worcestershire, UK
    yes I make it 73.5 ish, although I have rounded down to 100% on those couple that said slightly over 100, not quite sure how you can get 2 cards in crossfire performing more than twice as well as a single card. it does seem strange how the calculation is made, although I am assuming the process would have been the same for the 460's in SLi.
  21. pantherx12

    pantherx12 New Member

    Joined:
    Jan 2, 2009
    Messages:
    9,714 (4.79/day)
    Thanks Received:
    1,699
    Location:
    ENGLAND-LAND-LAND
    Including all bench marks ( unigine and all 3d marks) scaling is 70.8685%

    Although to be honest, considering games scaling so well and 3dmark doesn't to me shows it's no longer a relevant benchmark.


    These are the numbers used for calculation
    % scaling
    97.41 AVP ( all these ones are in same order as tests)
    89.79
    99.06
    83.5
    96.66
    80.51
    79.19
    100.88
    97.47
    84.57
    88.15
    70.94
    52.42 UT3
    45.49 WOW


    16.13 sucom 2
    2.07 COJ2


    90.65 3d04
    21.1 3d05
    22.1 3d06
    99.28 Unigine
  22. discy New Member

    Joined:
    Oct 6, 2010
    Messages:
    17 (0.01/day)
    Thanks Received:
    4
    jasper1605, HTC and pantherx12 say thanks.
  23. nt300

    nt300

    Joined:
    Jan 20, 2010
    Messages:
    868 (0.53/day)
    Thanks Received:
    159
    Location:
    Toronto, ON. Canada
    Umm, Crossfire scaling for the HD 6870 and HD 6850 is much better than Evergreen. Most if not all benchmarks including other sites they score almost double performance in Crossfire vs. the single HD 6870 card.
  24. zekans New Member

    Joined:
    Nov 1, 2010
    Messages:
    4 (0.00/day)
    Thanks Received:
    0
    I believe the drivers are at fault, as far as I know these benchmarks where Crossfire destroys FPS were done with Catalyst 10.10 whilst the others were 10.7 or something.

    Sadly I cant get 10.5-10.9 working on my new 6870 crossfire setup so I am stuck with rather bad FPS in WoW because of it. Hopefully AMD/ATI will pull the finger out and fix these drivers before I end up returning these and getting a 460 SLi setup.... if that turns out to be better I won't be returning to ATi anytime soon :S.

    10.11 better fix it :/
  25. W1zzard

    W1zzard Administrator Staff Member

    Joined:
    May 14, 2004
    Messages:
    14,639 (3.93/day)
    Thanks Received:
    11,374
    my 6850 and 6870 numbers were done on the 10.10 driver. if the 10.10 driver were magically doing something for cf then you would see that in the scores, which you apparently dont

    we are using wow dx11 in this round of benchmarks, so maybe that caused the problem

Currently Active Users Viewing This Thread: 1 (0 members and 1 guest)

Share This Page