Which motherboard slots to use for crossfire on Asus Maximus Extreme

I have 2 - XFX FX-777A-ZDB4 Radeon HD 7770 DoubleD Black Edition Video Card - 1024MB, GDDR5, PCI-Express 3.0 (x16), 1x DVI, 1x Mini DisplayPort, 1x HDMI, DirectX 11, Dual-Slot, CrossFireX, Eyefinity, Overclocked (P450-7774).
I have ASUS Maximus Extreme P67 Motherboard. Which PCIe slots are recommended to use for crossfire. And do I have to adjust settings in bios on the slots.
Thanks The noob.
5 answers Last reply
More about which motherboard slots crossfire asus maximus extreme
  1. You certianly don't have to adjust any settings in the bios and generaly the first slot closest to the cpu socket is for the first card and then the next full length slot for the second card.
  2. that board will run at x8,x8 no matter where you put the cards so don't worry about it.

    I would try to find the best airflow while still having it fit right.
    1 and 2 - try it but the second card might be several degrees hotter
    1 and 3 - Should be better
    1 and 4 - might not fit as nicely depending on your case, psu, etc.
  3. @slicedtoad

    when slot 1 is populated with a sound card / raid card / other

    Slots 2 & 4 will use the NF200 and both run at full x16 speeds

    HOWEVER, it has been proved that the lag of the NF200 chip negates any gains of running cards at x16

    see this review
    http://www.tweaktown.com/articles/4147/nvidia_nf200_x16_x16_vs_intel_x8_x8_p67_performance_analysis/index1.html

    i have the Z68 version of that board so the same goes, it just comes down to where the cards fit best.

    I use slots 1 & 3
  4. ^oh is see.

    4 x PCIe 2.0 x16 (x16 or dual x8 or x8, x16, x16)

    Most confusing specs i've read.
  5. yup, i was so confused to start

    the NF200 only becomes worth it in 3 & More card configs.
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