2-way SLI With a PCIex16 and PCIex4 Slot

Matthew-san · Jul 29, 2014

I was wondering if I'd see a performance difference in games if I use a 2-way SLI with a PCIex16 and PCIex4 slots than if I use two PCIex16 slots.

Yuna · Jul 29, 2014

You can't run sli any lower than PCIex8. Nvidia's driver will disable sli completely if one of it's graphic card is paired with a PCIex4 or lower slot.
AMD/ATI will allow their graphic card to run regardless of PCIe speed, the difference between PCIex16, PCIex8, and PCIex4 for sli, crossfire is miniscule, perhaps 1 or 2 fps difference at best.

bignastyid · Jul 29, 2014

What motherboard do you have. I have never seen one with a 16x and 4x that supported sli. Usually you need 2 16x ports or 2 8x.

Gorgonzer · Jul 29, 2014

What board do you have Matt?

Novuake · Jul 29, 2014

Even if it did support SLI, you don't want to run a graphics card on a PCI-e x4 slot, it will be a bottleneck.

Matthew-san · Jul 29, 2014

Ah I see, that's a shame. I now see why the motherboard I bought advertised crossfire and not SLI lol. I have to buy another motherboard, newb mistake

.

It's a Gigabyte GA-970A-D3P, here's a link to it: http://www.amazon.com/gp/product/B00DJ3DWFK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Matthew-san · Jul 29, 2014

Will I be able to SLI with PCIex16 and PCIex4 slots or will I need a new motherboard to do so? If so, do you guys have any recommendation for a good SLI motherboard?

Gorgonzer · Jul 29, 2014

Get the gigabyte 990fx version of that board. The UD3 is all you need!

Novuake · Jul 29, 2014

On AMD board, only 990FX chipset board, NOT ALL of them, support SLI, and with Intel boards, Z-series board, NOT ALL of them either.

Matthew-san · Aug 1, 2014

Alright, cool. If I'm going to go through the hassle of buying a new motherboard and installing it then I'll probably switch my CPU over to Intel since I had been planning on doing so. I'll give the Best Solution to whoever can find me a good Z97 motherboard capable of 3-way SLI, 32 GB RAM support, and for a good price lol. Actually, I could just use some opinions on a good Intel motherboard since I've been using AMD for a long time.

bignastyid · Aug 1, 2014

Matthew-san :

Here's the cheapest board that meets those requirements.
http://pcpartpicker.com/part/gigabyte-motherboard-gaz97xgaminggt

Matthew-san · Aug 1, 2014

Thanks bignastyid, looks like a good board and for a decent price. Anyone else have any suggestions?

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2-way SLI With a PCIex16 and PCIex4 Slot

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