For some strange reason 2 out of my 5 Ant Miners require re-flashing every day to bring back up to stock speeds of 441 GH/s they appear to run stable for about 12 hours or so and then both just fall to circa 420 GH/s. I have tried everything, replacing the thermal paste, swapping around the PSU's, factory restart, reboot etc. The only thing that helps (For a short period of time) is if I flash the device again and again every 12 hours or so.
Has anyone else got any thoughts on what else I could do? Or do I just have 2 faulty units?