Dual 780 Buffer Object Corruption

We have a rendering application that runs on a 780 and a cuda application that runs on another 780. The boards are not running in SLI. We’ve noticed rendering artifacts in the rendering application. Both vertex buffer objects and texture buffer objects can be randomly corrupted. We disabled the cuda application, so just one GPU is in use. However, we still see the rendering corruption. The dual 780 system is the only system with the corruption. If we remove the second 780, the corruption goes away. We have systems with single and dual 580s and they don’t have the corruption.

Any ideas on how to track down a problem like this?

Thanks for your help.