I did extensive testing and posted the results in that very thread .... it met with much resistance. I guess peeps didn't want their OC'sd tainted by any data which was contrary to the desired outcome.

Using RoG Real Bench, I observed no substantial difference at 4.6 Ghz with cache multipliers of 43, 44 45 and 46. Below that I saw a 3% drop in the RoG Image Editing portion of the benchmark, but no change on the other 3 portions. I tried it again after a BIOS upgrade and results were inconsistent.

Method I used was run the IE portion once and discard results ..... then do it 20 times and average runs 2 - 21 ..... all subsequent runs produce substantially higher numbers than the 1st run.

That > 3 difference I should add, is what is mentioned by JJ in his youtube Z87 overclocking videos.