980ti sli and PCI express proplem.

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olmaho123

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Apr 1, 2016
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I also engaged in building a more compact PC. I have plans also buy EVGA X99 Micro 2. it 3 PCIe slot 2 are x16 on are x8. I have 2 980ti and one network card. if I have to get everything to fit well, I must put network card between video card. But the PCI slot that is in the bottom is x8, where I plan on also put a video card. 
I have some questions.
1.it works even set network card between video card, which will be running in sli
2. there will be much difference if I video card in PCIe x8? on fps and stuff
3. it works also have a video card in x16 and in x8 also run them in sli?
 
Solution
PreXMystic
Depending on the processor you have, one may run at x16 and one at x8 or both at x8. Each card is assigned this bandwidth within the processor. If your processor has a total of 20 PCIe lanes, x8 will use 8 of them, x16 will use 16 of them. The downgrade from x16 to x8 in bandwidth won't cause that much of a performance hit, if any.

The bandwidth is not combined and each card uses its own bandwidth within the processor and chipset.

The two solutions with SLI with consumer grade chips will either be (In your case) x16 and x8 or both running at x8...
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PreXMystic

PreXMystic

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Oct 10, 2015
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To answer your questions in order:

Yes, orientation of the two video cards with a network card won't have any issues if the NIC is between the two graphics cards.

For your second question; there will be pretty much no impact on the performance. If there is any, it will be literally 1-2 frames per second.

And your final question; Yes, you can run one card at x16 and one at x8 and it will work fine.
 
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olmaho123

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Apr 1, 2016
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And your final question; Yes, you can run one card at x16 and one at x8 and it will work fine.

Wil one card run at x16 and one at x8 so it bena total of x24? Or wil botn run at x8?

 
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PreXMystic

PreXMystic

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Oct 10, 2015
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4,760
Depending on the processor you have, one may run at x16 and one at x8 or both at x8. Each card is assigned this bandwidth within the processor. If your processor has a total of 20 PCIe lanes, x8 will use 8 of them, x16 will use 16 of them. The downgrade from x16 to x8 in bandwidth won't cause that much of a performance hit, if any.

The bandwidth is not combined and each card uses its own bandwidth within the processor and chipset.

The two solutions with SLI with consumer grade chips will either be (In your case) x16 and x8 or both running at x8.

As long as the slot is an x16 slot electrically, you'll be fine.

 
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