Above error was for OptiX. here is what I get as anerror with GPU:
13:08:39 - Warning: Error Rendering in SuperFly.
13:08:39 - SuperFly: Illegal address in CUDA queue copy_from_device (integrator_shade_surface integrator_sorted_paths_array prefix_sum)
13:08:39 - SuperFly: Rendering time: 22.44 seconds.
13:08:39 - SuperFly: Rendering memory: 7153 MB.
13:08:42 - Analytics: Ending timer for Render:SuperFly