Well I found out the issue. I don't know exactly what it is but it only happens when I attempt to render the palm trees (other trees are fine). I moved their layer and it works perfectly fine. With them the scene could be incredibly simple and still not work. I don't know why but Im not complaining. I'm a tad embarrassed. Sorry guys.
Do you still need that info in case this is a bug you want to fix?

Sorry. I have realized its an issue only with the first card. It runs only using the second card. This is weird because I was using my first card for rendering up until installing my second gpu.