6 GHz all core is possible, but needs lots of voltage and very good custom cooling on a 14900K. Nothing that you would normally be able to do, and definitely not all chips either.

I have a 13700kf and although It’s not a 14700k It’s about the closest to it. To get 6ghz all core stable I need to disable HT and E cores and pump 1.42vcore through it and my chip has a SP of 95 which Is amazingly good for a 13700kf.

Edit* that’s also using a dedicated 520mm radiator In it’s own custom loop.

I have a 14700kf on a arctic liquid freezer 2 with MX6 thermal paste. Didnt spent a crazy amount of time overclocking but running 5.7ghz all (P) cores comfortably on 1.355 volts.

14900k all p core max without custom cooling is likely 5.8 GHz. And the 14700k has a lower bin so I’d say unless you get extremely lucky in the silicon lottery, then no. But why do you need all-core boost of 6 GHz? Instead of that, set per-core turbo ratios. Some of the cores will boost to 6, 5.9, 5.8. Etc.

I’d rather focus on raising your ring clock instead of chasing 6GHz. 🤷‍♂️ Followed by RAM tuning. It is gonna result you in a much higher performance gain.

With a 2000w chiller, maybe.

i have it set 5.7GHz on all p cores, the best i can do on.my nhd15