Running GTX 680 on SLI but one card is @X16 the other @X8???

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vosszaa

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Apr 27, 2012
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Hi

I'm using ASUS P9X79 Pro mobo and I just notice in the GPU-Z that both of my cards are running at different speed.

One card is X16 and the other card is X8 according to GPU-Z

Checking the manual and also ASUS website that I should put both cards on the "BLUE" slots to get a dual X16/X16 which I did but weirdly the result is X16/X8

How do I fix this?

Cheers
 
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vosszaa

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Apr 27, 2012
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I just tested with GPU-Z built in 3D rendering and it still show one card @x16 and one card @x8

Tested with game then alt-tab to see and it still x16/x8

 
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RussK1

RussK1

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Apr 15, 2011
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Move the second card one slot up PCIeX16_3 (white). I looked at the manual and it may be a typo. Typically the last PCIeX16 slot is controlled by the chipset and not CPU.

This is assuming bios is configured for PCIe 3.0 only.
 
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V

vosszaa

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Apr 27, 2012
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I'll try move it to the white one(second white) see if it change anything and i'll let you know.

 
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