The splitting of the +12V rail
jonny is one of the view doing "real life" PSU testing with appropriate equipment as compared to many other sites/reviewers who do a halfa$$ job or use only a DMM which is totally insufficient in measuring quality and performance of PSUs.
Haswell is probably the best and most overclockable CPU Intel ever made. It's just that the overclocking fun is restricted to a second or two. Then your system blows up due to the insane heat.