It all depends on how complex the password is. For an 8 char password, it would take a few min. For a 10 char alphanumeric password, several months on a singl

It all depends on how complex the password is. For an 8 char password, it would take a few min. For a 10 char alphanumeric password, several months on a single GPU For a 12 char alphanumeric password, Half a century on a single GPU, less if you are willing to throw money at it. The time would be significantly reduced if the password was vulnerable to a dictionary attack