Please, the spelling is "6 cores" or "6-core", never "6-cores". The hyphen signifies a compound word, and sixcores or six-cores simply isn't valid English. Six cores and six-core are.
A new leak has spotted AMD's new Zen 3-based 3D V-cache processor, the Ryzen 5 5600X3D. It has 6-cores, 12-threads and a base/boost clock of 4.4/33 GHz.