For v/f OC like the one in the photo for benching, you'd need to add NVVDD/MSVDD voltages to increase internal clocks. It's important to test requested clocks because they're the ones capable of crashing. Internal clocks only add performance. For daily use, normal OC offset + dip switches seems to be the best option.Yeah I reckon this confirms they’re noting factory tested overclocks.
Out of interest what’s your “effective clock” with that curve, using HWInfo? I’ve found setting a curve like that Afterburner misrepresents the real (aka effective) clock speed I’m achieving by as much as 100-150mhz.