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Thread: 16x16 vs 8x8




  1. #1
    Join Date
    Dec 2007
    Posts
    14

    Default 16x16 vs 8x8

    I am trying to decide between 2 Motherboards.
    The Gigabyte GA-P67A-UD7-B3 or theGigabyte GA-P67A-UD5-B3
    I need a board that allows me to use a needed PCI card along with 2 double space graphics cards.
    My build:
    MOTHERBOARD Gigabyte GA-P67A-UD7-B3
    CPU Sandy Bridge 2600k
    RAM CORSAIR Vengeance 8GB
    SSD OCZ Vertex 3 120 GB
    HDD WD 1.5 Cavier Black x2
    CPU COOLER Thermalright Silver arrow
    VIDEO CARD Sapphire HD6950 2GB x2 in Crossfire
    BLU RAY BURNER LG
    BLU RAY READER LG
    POWER SUPPLY CORSAIR AX1200

    The Vertex 3 and the motherboards are right around the corner. CPU will be bought at the same time. Everything else I already bought.

    Am I really going to see that much loss with 2 cards running at 8x on the Gigabyte GA-P67A-UD5-B3 as opposed to the dual 16x slots on the Gigabyte GA-P67A-UD7-B3 that has the NF200 chip?
    I am going for an O/C of 4.8 or so on air which if I understand correctly from what I have been reading will really help the 6950's.
    <!-- / message -->
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    E-MU E-DSP Audio Processor 1616m
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    W7 Pro 64bit
    Viewsonic VX2255wmb x2

  2. #2
    Join Date
    Aug 2009
    Location
    Birmingham,Great Britain
    Posts
    9,250

    Default Re: 16x16 vs 8x8

    You won't see any difference,maybe very slightly at super high resolutions
    Gigabyte z77x UP4-TH F11c Modded Bios
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    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
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  3. #3
    Join Date
    Apr 2009
    Location
    J'Habite En Angleterre
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    2,431

    Default Re: 16x16 vs 8x8

    Any difference between 8x/8x will be cancelled out by the slight latency introduced by the NF200, especially with one card in the CPU controlled 16x and another in a 16x supplied by the NF200.

    The only time anyone should insist on twin 16x lanes is when using two dual GPU cards.
    Coolermaster CM 690 II advance Case
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  4. #4
    Join Date
    Mar 2011
    Location
    Philippines
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    4

    Default Re: 16x16 vs 8x8

    Read this:

    <!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1026"/> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]--> Conclusion - GTX 480 SLI PCIe Bandwidth Perf. - x16/x16 vs. x8/x8 | [H]ard|OCP

    Now you must consider that the test setup they have, had native pcie lanes instead of interacting w/ the NF200 chip, w/c adds latency.

    From what I learned in the article, in single monitor gaming, it wouldn't matter but in eyefinity or nv surround it sometimes will!

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