We ran into a wall at 2,750mhz, and increased the memory voltage to 1.68v.
We managed to overclock the memory to 2,849mhz via a 106.9 BCLK/PEG frequency setting, by reducing the multiplier to 45 to achieve a final clock figure as close to the original 4.8ghz as possible. We didn't have to loosen any of the memory timings either which was extremely impressive.
System validation at these timings is available over here.
The overclock reduced the time further, to 4 minutes and 56 seconds. A class leading result.
The overclock helps generate more than 1GB/s of extra bandwidth, to over 26 GB/s. A decent increase.
The increased memory speed helps to improve copy, read and write results. This is actually our highest scores in this benchmark, to date.