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powercolor 3870 HD crossfire and GPU-Z

Discussion in 'AMD / ATI' started by Dadoremix, Apr 5, 2009.

  1. Dadoremix New Member

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    HI all
    i have crossfire with 2 cards ati 3870 HD powercolor rv670

    mainboard is asus P5K-E-wifi
    Procesor DualCore Intel Core 2 Duo E6750, 2666 MHz (8 x 333)

    crossfire enable but GPU-z say available but disabled
    ???

    and is good that 2nd card in only at 4x slot? 1st card is 16x bus interface?

    or not some improvement in crossfire mode?
    in 3dmark latest say cca 11 000 marks and with 2 cards cca. 13 000

    and one question for bios? is any new bios for these card?
    games are working good but fan is working all time in one speed, quiet and I think that it is not 100% used
     

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  2. DarkOCean

    DarkOCean

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    If you want to see inprovement in games and 3dmark you need to overclock your processor ,try 376x8.
    Second card is botlenecked by your 4x slot
    For fan control use riva tuner
     
  3. andreloo New Member

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    don't u have 2 x16 pci slots? open the ccc and enable crossfire
     
  4. Dadoremix New Member

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    Processor support Intel Socket 775:
    Core 2 Extreme, Core 2 Duo, Core 2 Quad, Pentium Extreme Edition, Pentium D, Pentium 4, Celeron
    Chipset Intel P35 / ICH9R
    Memory 4x 240-pin DIMM
    Dual DDR2 667/800/1066 channels
    Max. 8GB
    Expansion slots 2x PCI-Express x16
    2x PCI-Express x1
    3x PCI
    Storage 1x Floppy
    1x Ultra DMA 133/100/66/33 IDE
    8x SATA 3G (RAID 0/1/0+1/5/JBOD) (two external)
    Internal connectors 4x USB
    1x IEEE 1394 (Firewire)
    1x COM-port
    1x FrontAudio
    1x CD/AUX input
    External connectors 1x PS/2 Keyboard
    2x S/PDIF Ut (Coaxial + optic)
    1x IEEE 1394 (Firewire)
    2x SATA
    6x 2.5mm audio connectors (7.1)
    1x RJ-45 (10/100/1000Mbit)
    6x USB
    Size 305 x 244mm
    Other Wireless LAN

    all sites say that these motherboard have 2 pci-e slot 16x
    but i find on asus along time before that is 1 pcie blue 16x and black 4x
    now on asus site these information cant find.
    and GPU-Z say that 2nd card in on 4x speed
    in bios is all ok, no settigns for speed for pci-x slots

    in pictures is crossfire X on, but gpu-z say disabled
    or is enabled only in game ?
     

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  5. kenkickr

    kenkickr

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    Do you have the cards connected with atleast one crossfire ribbon cable?
     
    Crunching for Team TPU
  6. Dadoremix New Member

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  7. Dadoremix New Member

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    yes
    i try with 2 also, now are two
    but I think that the problem is in the second PCI slot and 4x speed
    but why GPU-Z says that crossfire is disable when it runs enabled
    strange
     
  8. JrRacinFan

    JrRacinFan Served 5k and counting ...

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    The x4 thing is right for your second card. As far as crossfire is concerned, do you have vista/vantage that you can run to confirm?
     
  9. angelkiller

    angelkiller

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    Having a 3870 in a PCI-E 4x slot really hurts performance. This article shows that a 4x link is not adaquate for a 8800 GTS, which performs about the same as a 3870. Generally speaking, if PCI-E 16x was represented at 100%, PCI-E 8x is about 85% and PCI-4x is about 60%. So you're only getting about 60% of the performance of your 3870, which is a significant hit imo. I would recommend an upgrade to a cheap P45 motherboard with 2 PCI-E 16x slots. You're not overclocking (yet), so you don't need a board that can do high FSBs. All P45 mobos can do at lease 400MHz FSB, which is plenty for your E6750. And a P45 boards are able to do 8x 8x Crossfire, which is pretty good for a mainstream solution imo. Definitely more performance in a 8x 8x setup than in a 16x 4x setup.

    It's odd that Crossfire doesn't get enabled. I don't know how to help you there. :eek:
     
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  10. JrRacinFan

    JrRacinFan Served 5k and counting ...

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    But even if it is a x4 slot, it would be pretty decent performance increase over a single 3870. One other item to look at Daderomix. Do you have Catalyst AI enabled?
     
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  11. Dadoremix New Member

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    drivers are 9.3 default settings with crossfire enabled
    Catalyst AI is default enable

    maybe is time to upgrade mainboard but then you will new cpu, more ram, new ATI maybe 4890 :D
    hmmm.. hard to get all these right now

    anyone know how high E6750 is going ? now is default 2,66 GHZ, i try to 3.02 GHz on these asus
    and can anyone recommend a new mainboard like my asus but with 16x 16x pci-x

    because i like these asus right now, only 1 shitty pci-x at 4x make me angry
    pc is right now old 1.5 year
     
  12. JrRacinFan

    JrRacinFan Served 5k and counting ...

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    As far as a new mobo that would be inexpensive....

    Asus P5Q Pro. :)

    Oh also, should be able to see 3.2Ghz out of that chip on stock volts.
     
  13. Dadoremix New Member

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    i decide to sell these 2 ati cards
    and buy one 4870, because I came to
    cheaper than MBS change
    Any improvement to be expected? 2x 3870 crossfire VS. 1x 4870
    and which manufacturer to buy? asus, gainward, gigabyte, sapphire ?
    wich is for more overclock?
     
  14. Assassin48 New Member

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