Weird Problem after PCIE-Riser intallation

[GameTime007]

Hey,

 

So, I have somewhat of a problem after upgrading my PC.

 

I have 2 watercooled GTX 1080Ti's in SLI that I put into vertical orientation using a custom fabricated solution mad from 2 Cooler Master Riser Kits. I also used the included Riser Cables. Both Cards detected fine in the BIOS (Only with 8 PCIE Lanes though, but I guess thats down to my damaged CPU, that also only recognizes 3 Memory Slots), so I filled up the system and booted it up.

On the Windows lockscreen I immediatly noticed that there was some weird artifact which looked like my PC had 256 color mode enabled or something (See Image attached). Once Wallpaper Engine started I noticed extreme lag. After some diagnostics I thought I might be that my 3D Performance isn't working, because Normal Windows were working mostly fine. General System Performance is also fine (I'm currently writing this on the affected PC). YouTube etc also still work. After firing up a game, to find out how that would perform I found that it actually ran. Though, compared to before I had a bit more than half my previous FPS and lots of microstuttering and tearing.

 

The Riser runs are pretty tight and bendy. My current theory is, that GPU2 is still working and GPU1 isn't. And that the processed signal is somehow passed through the SLI bridge to the other card and it's output. Device Manager also confirms that. It declares a Code 43 for the upper GPU (GPU1). I sadly have no way to acess the IO of the 2nd GPU, beacuse it's obstructed by my custom solution.

 

I'm asking all of you if someone knows somthing I can do with Software or that someone can give me some tips on what to do hardware wise. Due to the system being watercooled tearing it apart is lots of work. Another thing to note is, that I live in Germany, I might not be able to get some products, at least not in a timely fashion (I need this PC for A LOT of Stuff :=P)

 

Sincerly,

Nick

 

P.S. Specs:

 

i7 6800k

ASUS Rampage V Edition 10

2x GTX 1080

32GB (24 detected) Corsair Vengeance

EVGA 1600 T2

EKWB Water Cooling

[Eastman51]

I would try to DDU your display drivers and reinstall them. I'm guessing that your setup was fine before you installed the risers?

[GameTime007]

Okay, I'll try DDUing it first. If that doesn't magically fix it ill post some pictures. Not "creasing" the cable is pretty hard, due to the spacing, but i'll try to adjust. Give me a minute

 

EDIT: Also, my 2nd Display doenst get recognized. Not matter what port, even on the port my primary display is plugged into.

[GameTime007]

I have now DDUed the thing and am currently installing the NVIDIA drivers. The artifacting is gone and my 2nd Display works. Wallpaper Engine also seems to work again? It maght actuqlly work!

[GameTime007]

Wow, this actually worked magic! Everything seems to be working like a charm! Thank you so much!