Despite MSI's Z490 Godlike being brand-new, and the i9 10900K only having been on the market very shortly, an all-core overclock of 7.42492 GHz has already been reported via
Valid through an appropriately verified CPU-z screenshot.
The Intel Comet Lake has been met with mixed reviews, but doubling the base frequency on all cores is pretty good.
It was submitted by the user Tsaik, using just a single stick of very tight 15-15-15-36-2 timed 8 GB DDR4 ram.
The data doesn't tell us what cooling solution was used, but we doubt it has the cheapest £50 solution from the nearest electronics store.