If you haven't tightened RAM timing, it's worthwhile to do next.
Realbench responds to efficiency including RAM bandwidth and the OS tweaks in Myk SilentShadow's thread.
I've had my Haswell dog against the stops - 1.58 Vcore for benchmarking - for a while. My realbench score sneaked up from 88500 to 90784 all at x47 with RAM and OS tweaks.
Jeff