FWIW, I've transitioned now to using the cuda 9 based EWBF code rather than the one marked 'cuda8', and my cards have never been happier - I'm also now running the latest Nvidia drivers version 398.36, so not sure which resolved my crashes really - but between the 2 changes, I am running now 24 hours without a crash (knock on wood).  YMMV and all that of course.  My environment is a mix of about 80% 1060's, 10% 1070's, and 10% 1080's.  With 1 lonely 980ti to keep the 'way back machine' gods happy.  Love that card, and you couldn't pry it outta my hands!  

But I digress.  0.4 is pretty sweet, all good on this end for now.