Operating system: Linux-5.3.0-7629-generic-x86_64-with-Ubuntu-19.10-eoan 64 Bits
Graphics card: GeForce RTX 2080 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44
Broken: version: 2.83 (sub 6), branch: master, commit date: 2020-03-04 04:24, hash: rBfb330dd11098
Worked: 2-3 days ago
Short description of error
One of the recent changes to Cycles has introduced a Path Tracing sampling error when using CUDA on a 1080.
It does not happen with an RTX 2080, and also not when using OptiX. It also does not occur when using BPT.
Exact steps for others to reproduce the error
Open this file and render.