We have been developing an application that uses a optimization algorithm known as LBGFS-B. A Cuda implementation was done for it a few years ago and it is available on the web. We have been using it successfully for a few months.
The other day I installed a new GTX Titan card. Suddenly the optimization stopped working correctly in release mode. Works fine in debug mode, and it works fine in debug and release modes when I use NSight for Cuda debugging.
I installed the Titan in another computer on which I had first verified the code worked fine and the problem followed the card.
We are trying to find some other testers with GK110 or higher GPU to test and tell us their results. We have put the source code for a very simple test app on github (https://github.com/Akson/L-BFGS-B-Solver-test) that should be run in both debug and release modes. It works fine on GTX770, 690, 680 and lower cards, but not on Titan.