I have the following CUDA error when trying to render my project in cycles:

CUDA error: Launch failed in cuCtxSynchronize(), line 1372

My scene rendered well some days ago. After adding new elements and models the error appeared. I had this error already some time ago, while working on this project, but after changing the content and sample amount in the render settings it disappeared until today.

I am using a GeForce 1080 Ti with 11 GBytes of Ram. The scene use currently not much vram of my graphic card. So the vram can not be the reason.

Any ideas for a solution please? Maybe some developers are reading this too.

Thank you a lot for any tips


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1 Answer 1


I struggled with this problem for months. Used different computers, re-installed Blender, re-installed windows (I am using 8.1 & 10), installed new and old drivers for my Nvidia card, changed the TDR and everything I could think of...but no luck.

Then it occurred to me that the Gforce Experience runs in the background (and being in my opinion, not a well written program) may be overlapping the memory of Blender or at least hogging the memory. So I un-installed it and magic!!! All Cuda errors and memory errors went away. Blender works again as it should!!!

I hope this works for you, as it did for me. Unfortunately, I did not discover this for months, until I had pulled every single strand of hair out of my head.

  • $\begingroup$ Thank you for your answer. This is interesting. I have not tried your solution yet but there is an article I have written to solve the issue even if you have GForce Experience running and don't want to uninstall it. Here ist the link to my article: christoph-werner.de/2017/12/31/… I forgot to mention it here. $\endgroup$ Mar 31, 2018 at 16:23
  • $\begingroup$ Thank You for your reply' I can see that you are very experienced and that was a nice link to your report. For me, the TDR changes did not solve it. If I re-install "The Experience" The issue returns. Since Blender is more important to me and I can do manual driver updates, I choose to keep a functioning Blender. $\endgroup$
    – Royov
    Apr 1, 2018 at 4:53
  • $\begingroup$ Have you tried higher TDR values like I mention it in my article to increase the waiting time? Sometimes 30 seconds are far not enough. Greetings. $\endgroup$ Apr 1, 2018 at 12:14

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