PCIe lanes with GPUs and wifi cards

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qubert

Reputable
Oct 19, 2014
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I hope this isn't too stupid of a question. A Z97 chipset has 16 PCIe lanes. If I install a graphics card in a 16x slot and a wireless card in another PCIe slot, does this knock the GPU down to 8x or otherwise affect it's performance?
 
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H
Usually the motherboard will open more lanes than the chipset originally specified.

For example I'm using this board
http://www.gigabyte.com/products/product-page.aspx?pid=4168#ov

It has full PCIE X16 Gen 3 support with all bandwidth shared across the first and last full length slot. My HD 7950 is in the first slot running at full speed.

And I have a PCIE X1 wifi adapter card on the second full length slot that has its own X4 bandwidth.

Yet Intel only specified max 8 lanes and Gen 2 support for the Z77 chipset.
http://ark.intel.com/products/64024/Intel-BD82Z77-PCH
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huilun02

Splendid
Feb 29, 2008
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24,960
Usually the motherboard will open more lanes than the chipset originally specified.

For example I'm using this board
http://www.gigabyte.com/products/product-page.aspx?pid=4168#ov

It has full PCIE X16 Gen 3 support with all bandwidth shared across the first and last full length slot. My HD 7950 is in the first slot running at full speed.

And I have a PCIE X1 wifi adapter card on the second full length slot that has its own X4 bandwidth.

Yet Intel only specified max 8 lanes and Gen 2 support for the Z77 chipset.
http://ark.intel.com/products/64024/Intel-BD82Z77-PCH
 
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