I conisdered that , but in the past when it has happened , Blender has remained open and come up with the error CUDA , out of memory , rather than just instantly shutting down.
However , it could well be that , as I have discovered that the scene renders fine with the 1080Ti on tiles , but as soon as I introduce any , or all of the 1080s it crashes. Now the 1080Ti has 11GB VRAM I believe , whilst the standard 1080s only have 8GB . It makes sense that it is the issue , but still seems strange that it does not just stop the render with an error as It has done in the past….
Thanks for your reply