The H100i is a pretty poor cooler when ya think about the fact that it gets it's tail kicked by cheaper air coolers like the NH=D15 and R1 while the H100i is 8 - 12 times as loud. If requested, we will not install any CLC in a user's system. Cheap aluminum rads and weak pumps required the designers to compensate with hi speed, noisy fans but even with these, the air coolers still cool better thermally.
A Swiftech H240-X2 would do a better job, dropping temps about 9C while dropping noise by a factor of > 4
http://www.swiftech.com/h240x2.aspx
I would have no problem at 1.4 volts (1.5 when AVX is present) and temps of 80C during the RoG RB test. Yes, the CPU wont get destroyed and wont start throttling till it gets to near 100C but at those temps the long term viability of the CPu comes into question as the higher heat and higher voltage will degrade the material between circuit traces over time. if you are a competitive overclocker, and it last you 6 months, you won't care .... OTOH, if you make a living off your PC and the CPU dies or becomes unstable over time, you likely would.
What are you using to put the load on your CPU and test stability ?
I would not recommend a synthetic benchmark for this effort unless of course you goal is to get your name on web based leader boards for doing exactly that. If the Pc will eb used for work or entertainment, then I would test with RoG real bench and monitor w/ HWiNFO64 (run sensors only)