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Threadripper SLI

Jose Luis Pedrosa
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Hi Guys

 

I'm curious how a SLI setup would work in the ThreadRipper CPU with many PCI at 16x. Should we expect a more linear behaviour? I'm not sure if SLI does not scale linear due to PCI bandwith limitation in 1x16 + 1x8 Setups.

 

Opinions?

 

JL

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2 minutes ago, Jose Luis Pedrosa said:

Hi Guys

 

I'm curious how a SLI setup would work in the ThreadRipper CPU with many PCI at 16x. Should we expect a more linear behaviour? I'm not sure if SLI does not scale linear due to PCI bandwith limitation in 1x16 + 1x8 Setups.

 

Opinions?

 

JL

well most boards will have 2 x16 and 2 x8 or 3 x16, and with a 1080ti you will not see any performance loss at PCIe 3 x8 so you should be able to do 4 way fine on TR.

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8x shouldn't really affect you performance vs 16x , so i doubt it would make a difference

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Modern GPUs don't use more bandwidth than an 8x slot

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Yeah the only time you'll see that performance benefit of x16 over x8 is in a stress test like Firestrike or Time Spy that's trying to max out every facet of the GPU.

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  • 2 weeks later...
Posted

Hi there, sorry if post is a bit old but I'd like to say that categorically declaring something like x16/x16 will not benefit you more than x8/x8 is simply wrong. 

 

There are games that benefit from full bandwith and in those games CPU's with more PCI lanes destroy mainstream CPU's like i7 7700k (in SLI ofc).

 

I will drop this here:

 

 

 

and this (even more impressive since we're talking 6core Haswell-E vs. Kaby Lake)

 

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