I've gotten the hang of the samsungs on the Mpower max, but psc is a bad time every time. Didn't really mess with them at 2400, but 2666 is a bad time. I just stick to samsung on it. Even then, it took a bit of work to get samsung to work well. Time is still a good bit off though. I had to loosen up a few things to get 2858 to run compared to 2800.