6870's have worse performance in CFX????

Hello, First off I'll give my specs.
FX 4100 @ 3.6
2-Powercolor hd 6870 1gb @ stock
Asrock 970 Extreme 3
Viotec 1200 watt psu
4-2gb Kingston HyperX 1600 ddr3
3-Patriot Warp 32gb ssd Raid 0
1TB WD green
Antec 100 Ice case
Acer 24" 1920X1200
Logitech G13,G9,Attack 3

I have used drivers 11.10 to 12.1 with and without caps on fresh Os installs for every driver with no scaling.

I have also tested the cards by themselves in each of the PCI-E slots. Both cards are fine and I'm only seeing 2-5 fps lower in the x-4 slot on the mobo. I have confirmed CF is enabled. With CCC and GPU-Z. There is only one program showing improvement with CF. Unigine Heaven.
Average fps with 1 card is around 32 and with 2 cards 64. This is on the standard benchmark with no submision. All others show worse performance all the way around.

Games and benchmarks I use/play
COD- all of them
BFBC2
BF3
DIRT3
3D06
3D11
Unigine Heaven

Tools used for monitoring
MSI AB
GPU-Z
HWMONITOR

I run the cpu and mem @ stock. I have OC'D to 4.4 and 1600 on the mem but still didnt help.
I have also used a 120gb seagate in a non raid just to rule that out as well.

Is There anything that I'm missing?

I have been a Bench Tech for 6 years and in the IT industry for about ten years. I have run CF and SLI set ups many times over with great success but I have run out of answers here.

Any help or Ideas are welcome and TY in advance.
8 answers Last reply
More about 6870 worse performance
  1. i googled a bit and i noticed that viotek made list on one forum's 'brands to avoid' list. others agree.
    about possible cpu bottleneck:
    http://www.tomshardware.com/reviews/fx-overclock-crossfire-ssd,3098.html
    the asrock motherboard's 4 lanes in the second pcie 2 slot could be choking the second card when the cards are in cfx.
  2. This was my thought and thats why I tested the cards single in the X4 slot.
    The odd thing is Unigine is the only program to push both cards to 100% gpu usage in CF on all drivers?
    All other games and 3D06 show about 30-50 % usage per card on all drivers.
    While the cpu might be a BN should I not see some improvement instead of a decrease in fps?
  3. Hello, First off I'll give my specs.
    FX 4100 @ 3.6
    2-Powercolor hd 6870 1gb @ stock
    Asrock 970 Extreme 3
    Viotec 1200 watt psu
    4-2gb Kingston HyperX 1600 ddr3
    3-Patriot Warp 32gb ssd Raid 0
    1TB WD green
    Antec 100 Ice case
    Acer 24" 1920X1200
    Logitech G13,G9,Attack 3

    I have used drivers 11.10 to 12.1 with and without caps on fresh Os installs for every driver with no scaling.

    I have also tested the cards by themselves in each of the PCI-E slots. Both cards are fine and I'm only seeing 2-5 fps lower in the x-4 slot on the mobo. I have confirmed CF is enabled. With CCC and GPU-Z. There is only one program showing improvement with CF. Unigine Heaven.
    Average fps with 1 card is around 32 and with 2 cards 64. This is on the standard benchmark with no submision. All others show worse performance all the way around.

    Games and benchmarks I use/play
    COD- all of them
    BFBC2
    BF3
    DIRT3
    3D06
    3D11
    Unigine Heaven

    Tools used for monitoring
    MSI AB
    GPU-Z
    HWMONITOR

    I run the cpu and mem @ stock. I have OC'D to 4.4 and 1600 on the mem but still didnt help.
    I have also used a 120gb seagate in a non raid just to rule that out as well.

    Is There anything that I'm missing?

    I have been a Bench Tech for 6 years and in the IT industry for about ten years. I have run CF and SLI set ups many times over with great success but I have run out of answers here.

    Any help or Ideas are welcome and TY in advance.
  4. 1-uninstal ccc and caps using add/remove from control panel.,shut down
    2-remove second card,restart
    3-install latest ccc and caps,shut down
    4-reinstall second card and restart.

    DO not use a driver sweeper program !

    let us know how that worked out.
  5. Earnie said:
    1-uninstal ccc and caps using add/remove from control panel.,shut down
    2-remove second card,restart
    3-install latest ccc and caps,shut down
    4-reinstall second card and restart.

    DO not use a driver sweeper program !

    let us know how that worked out.



    I have used drivers 11.10 to 12.1 with and without caps on fresh Os installs for every driver with no scaling.
  6. what happened to the other thread you opened?
  7. No one was answering so I moved it here in hopes of more responses.

    The X4 lane is not choking the cards.

    http://www.youtube.com/watch?v=rSfifE2Domo

    This only leaves one thing and that would be the CPU :(

    Thanks for the patch Idea but this did not help. I tried it 3 days ago.

    I should have spent the extra money on the I7 and just been done with it.
    I'm a sucker for the under Dog.
  8. This next topics has been merged by Mousemonkey
    Crossfire 6870's worse performance than single card.
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