Hey DragonKnight,
We have a thread covering these types of errors here. There’s a lot of information there that can help out.
In your case, I checked the error report being sent to us and it appears that Windows is reporting that the card lost power or was removed. You may want to try reinstalling the Nvidia drivers or checking for overheating. If this persists, there may be a deeper hardware problem causing an issue. I would suggest avoiding competitive mode until you figure out this problem though.