I purchased a 3 pack of the Riing 12 last week. I have 2 pushing out and one pulling but cannot seem to get the fans to run faster than 750-775 on the blue mode and 475-500 on red mode. I have tried all 4 pwm slots available to see if that would affect anything. Even tried to use SpeedFan to see if I could manual overite it. No luck. Am I missing something or is that just the way it is?