If your at your hardwares limits, thats not really a bad thing. Its good to know.

Something you may wish to consider for 24/4 use:
I would suggest backing it off a bit and play with the voltages a bit to see how much lower you can get them.

Perhaps in the 3.6-3.7 range. You wont really notice any difference performance wise, and might find things actually run smoother a bit below the max point.

Not to mention, less power draw & heat being created. I always like to do this after finding the limits.

Just my opinion. Good luck :)