PCI-E x8 w/ 1080 Ti - Limiting Potential?

[MooseKnuckle]

I think I will be fine, however I wanted the opinion of the community on this one.

 

I'm putting together the following system;

 

Asus ROG Crosshair VII

2700X

1080 Ti

2x 960 Pro NVMe (RAID 0)

 

So this MoBo will support NVMe RAID, however it will drop the x16 PCI-E slot down to x8 speed as a result.

Will this incur and performance penalties on my GTX1080 Ti.

 

 

Thanks for the help.

[JustMATT]

yes.... that speed at loading textures into memory thing that computers do a lot? yeah thats gonna be at half speed...

[Skanky Sylveon]

I have done tests with both gaming and compute operations on a GTX 1080.

My conclusion was that the GPU wasn't able to even fully saturate a PCIE X8 connection, meaning there was no difference outside of margin for error.

 

Here are some CUDA based render results.

X16

Spoiler

X8

Spoiler

Yes, the X8 connection actually took less time to complete the render.

Although, again, the difference was well within the margin of error.

 

Keep in mind that a 180 is not a 180 ti, but I would expect similar results.

[Enderman]

17 minutes ago, JustMATT said:

yes.... that speed at loading textures into memory thing that computers do a lot? yeah thats gonna be at half speed...

GPUs do not use enough PCIe bandwidth to saturate x8.

There will be no performance difference between x16 and x8 (his motherboard is PCIe 3.0)

[MooseKnuckle]

Thanks for the replies.  Most things I find on the net don't specifically target the 1080 Ti.  I've seen 1080 and Titan Results.  I expect them to be in the same ball park.

 

I am more so looking for reassurance that I haven't made a bad decision.

[A1Mike_W]

Gamers Nexus did a video on this a while back. We're only just approaching the limits of x8 with dual Titan V. Your 1080ti will be fine.
 

 

[Fenweekooo]

I have to run my 1080Ti in a lower pcie slot (supposed to also be 16x also but despite being labeled that asus has different ideas and only runs at 8x) and i have no issues whatsoever performance wise

[Frankenburger]

7 hours ago, A1Mike_W said:

Gamers Nexus did a video on this a while back. We're only just approaching the limits of x8 with dual Titan V. Your 1080ti will be fine.
 

 

It's different with SLI. Even SLI GTX680's show a benefit of being on dual 16x/16x