2 GPU's in one PCI-E slot

QuackDuck

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Feb 4, 2016
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My PC only has 1 PCI-E slot, and I had wanted to add in two GPUs for AMD CrossFire, or maybe NVIDIA SLI, depending on which manufacturer I choose. Can I use this to help me with my setup?

www.amazon.com/Supermicro-RSC-R2UT-2E8R-RISER-PASSIVE-2-PCIE/dp/B0037KAE2O/ref=sr_1_2?s=pc&ie=UTF8&qid=1462499726&sr=1-2&keywords=supermicro+pcie+riser

Thanks! :)

P.S. I do already have a nice power supply for the two GPU's.
 

Rogue Leader

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Riser cables do generally work fine. You cannot use a PhysiX card with a AMD card, as the two sets of drivers can't co-exist. You could probably do it with 2 Nvidia cards I would imagine it could work. Assuming of course you also get a better power supply. Your computer will be a Frankenstein as if you have an SFF case you won;t be able to fit a PSU that can handle the 2 cards (or any good card for that matter).
 

Rogue Leader

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No that will not work.

First off the BIOS of the board will not support SLI or Crossfire so even if you got 2 cards in there it would not work. Secondly even if it did work the slots are too close together to fit 2 cards. Also you would need a special case just to hold them safely and them be accessible.

Its cheaper and better just to buy a new motherboard.
 

QuackDuck

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I know that it would be better to just buy a new mobo, but Dell uses these weird proprietary motherboards in the OptiPlex 755 SFF. What if I were to use some PCI-E riser cables that I have sitting around, to hook up the GPU's to the splitter. And then use an AMD and a GeForce so I have something to offload PhysX onto. Could this work?

BTW, I have used those riser cables on GPU's before, and they work fine. Dust also should not be an issue.
 

Rogue Leader

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Moderator


Riser cables do generally work fine. You cannot use a PhysiX card with a AMD card, as the two sets of drivers can't co-exist. You could probably do it with 2 Nvidia cards I would imagine it could work. Assuming of course you also get a better power supply. Your computer will be a Frankenstein as if you have an SFF case you won;t be able to fit a PSU that can handle the 2 cards (or any good card for that matter).
 

QuackDuck

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Okay, I will look into doing this. Thank you!
 

RobCrezz

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Actually the two sets of drivers can co exist, it doesnt work because nvidia intentionally stopped it from working when using a AMD primary GPU.
 

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