A Geekbench v3 multi-core score of 78323 has been achieved by a i9-7960X overclocked to 5.4 GHz on all 16 cores using liquid nitrogen (LN2) as the coolant, which is three times higher than an i7-7700K. While LN2 results are always at the top end of the scale, it shows that this CPU could have a sizeable headroom for overclocking. The only official results which are higher come from Intel Xeon and AMD EPYC server processors.
https://www.notebookcheck.net/Overclocked-16-core-i7-7960X-at-5-4-GHz-scores-three-times-higher-than-i7-7700K-on-Geekbench.241406.0.html