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  1. #1
    Mar 2012
    South Florida

    Z77 PCI-E 3.0 slots, baffled?

    I noticed that motherboard manufacturers of Z77 boards are putting 2 PCI-E 3.0 slots on their boards, but it is not what it seems. You can only use one slot at x16 bandwidth, if you put in 2 cards in SLI/CrossfireX you only get (x8,x8).

    My question is would a z68 mobo with PCI-E 2.0 thats able to do SLI (x16,x16) better than a Z77 w/ PCI-E 3.0 (x8,x8) in SLI? or is it the same?
    From ASRock site:
    "2 x PCI Express 3.0 x16 slots (PCIE1/PCIE3: single at x16 (PCIE1) / x8 (PCIE3) or dual at x8/x8 mode)"

    I am building a new rig and have a GTX680, and I just need to buy a CPU/Mobo to complete the build. Thanks
    Last edited by gordong11; 04-01-2012 at 08:57 PM.
    Thanks new build (4/7/2012)
    Intel Core i7-3820 SB-E OC'd to 4.625Ghz
    Asus Rampage IV Black Edition
    16mb Samsung DDR3-1600 (MV-3V4G3D/US) 2x(2x4mb) @ 1666 9-9-9-28 1.50v
    Corsair Carbide 400r
    Corsair H70 Core liquid cooler w/2x COUGAR CF-V12HP 12CM Silent Fans w/Pulse Width Modulation
    EVGA GTX680
    Thermaltake toughpower grand 750 (80+ Gold)
    Intel 520 180GB SSD
    Seagate momentus XT 750 SATAIII gen2 hybrid
    LG WH12LS39 BD burner w/ 3D MDisc Lightscribe
    Dell UltraSharp U2412M LED 1920x1200 w/IPS
    Cerwin Vega XD3 2.0 speakers
    Windows 7 Pro 64-bit

  2. #2
    Jan 2003
    Grand Rapids, Michigan

    Re: Z77 PCI-E 3.0 slots, baffled?

    Since cards these days cant saturate a full 16x on PCI-E 2.0 let alone 3.0 I wouldnt worry about it. I think I actually run my 480s at 8x/8x. There was an article awhile back someone found for me when I had the same question that proved there was no difference.

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