@Stagefire, not really. I got 3 9900 K and a KF before this one and some where just the "loser" and some where just midrange. I was just a bit more lucky with the KS... most KS need something like ~1,15v for the 5Ghz.
The 9900k i had, needed 1,25-1,3v and the KF from Aerotracks needed 1,19 for...