my zotac gtx 970 has a word down fan bearing and i was wondering whether it would be a good idea to leave the download on overnight or not, could the fan stop working almost instantly? it did make some noise but recently the grinding noise has stopped for reasons unknown to me, the affected fan is still spinning though, im concerned that if i do leave it on the fan could die or get a lot worse more quickly. how long do slightly worn fan bearings usually take to break (make horrible grinding noise or die) just so i know how much more use i can get out of the card within the warrant period cause i need it for the coming months and then i will most likely rma it for the fan problem as it is within the standard warranty period of 2 years, thanks for reading, have a nice day