Unless you have the absolute worst IHS contact possible, 4.7 GHz all cores should be very easy. If your IHS contact happens to be terrible, no ambient cooler - including custom watercooling setups - is going to fix the thermal bottleneck between the die and IHS.
For reference, I have an i7-7820X at 4.8 GHz running on an NH-D15S. The CPU alone can pull up to 275W. There's no way you're going to get an i7-8700K to pull nearly as much power or dump nearly as much heat, so you should be fine. I would, however, consider delidding or purchasing a delidded CPU. There is always a nonzero chance you get absolutely awful IHS contact.
I didn't spend a lot of time messing with it before delidding, but I had no issues at 5.1 in realbench with my nh-d15. I think it hit 83c at 1.35 vcore. The vcore was higher than needed but I just wanted a quick baseline before delidding, and delidding did drop temps around 15c.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ask a question
Ask a question
Overclock.net
27.8M posts
541.2K members
Since 2004
A forum community dedicated to overclocking enthusiasts and testing the limits of computing. Come join the discussion about computing, builds, collections, displays, models, styles, scales, specifications, reviews, accessories, classifieds, and more!