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Explain! PCIe

LordXavier
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The graphics card would only make a x8 connection in that case.

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So if i am am using 2way sli x8 x8 then adding card to x1 slot will bring my sli config to x4 x4?

Well no, if that was the case then you wouldn't be able to SLI. IIRC SLI requires an x8 slot.

 

You would have to chose between that 1x card or SLI in that case.

//ccap
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So if i am am using 2way sli x8 x8 then adding card to x1 slot will bring my sli config to x4 x4?

I believe you need a minimum of 8x to run in sli mode.

The GPUs will work at x1 speed but won't run in SLI.

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Well no, if that was the case then you wouldn't be able to SLI. IIRC SLI requires an x8 slot.

You would have to chose between that 1x card or SLI in that case.

I believe you need a minimum of 8x to run in sli mode.

The GPUs will work at x1 speed but won't run in SLI.

So if i am am using 2way sli x8 x8 then adding card to x1 slot will bring my sli config to x4 x4?

No, sli would work fine. They would just run at Gen2 x8/x8.

 

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I have 780 sli and a pcie 1x wireless card and Nvidia control panel is saying the graphics cards are running at gen 3 8x8x.

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No, sli would work fine. They would just run at Gen2 x8/x8.

 

You need to quote a post or tag a member or else they won't get a notification you replied to them.

 

Ah true I forgot about 3.0

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Usually PCIe x1 slots are wired via the secondary lanes provided by the chipset, so they don't use the CPU's lanes.  They wouldn't affect the configuration of the full length slots at all in this case.  If you were using one of the x1 slots, you could still run your graphics card/s at x16 or x8/x8.

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@Glenwing is spot on.

The Z97 chipset is capable of providing up to eight PCI-E 2.0 X1 lanes.

It just depends on if the motherboard manufacturers decide to implement them...or cheap out.

z97-chipset-diagram.png

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