So why are there only eight cores when the current Comet Lake-S offers up to ten cores? Word on the street is that it's because Rocket Lake-S is basically a 14nm version of the mobile Tiger Lake. VideoCardz reports a six-core sample got spotted in the 3DMark benchmark database:
The two known leakers (TUM_APISAK and _rogame) have posted the result of the first Rocket Lake-S sample, featuring 6 cores and 12-threads. The CPU has a base clock of 3.5 GHz and a boost clock of around 4.1-4.2 GHz. This is clearly an engineering sample running on the engineering platform (look at the Motherboard field in the leaks).
3dmark 11 Performance
— _rogame (@_rogame) May 22, 2020
Genuine Intel(R) CPU 0000 @ 3.50GHz
6C/12T 3.5GHz base 4.2GHz boost
Intel Corporation RocketLake S UDIMM 4L ERB
Physics test : 11887
Graphics test : 1900
For context i5-10400 6C/12T 2.9GHz base 4.3GHz boost
Physics test : 12828
Graphics test : 1822 pic.twitter.com/u4rcjs5Wz2