Over at OpenBenchmarking.org, they published benchmark results from a 64-core server processor, and yes it is AMD's upcoming Epyc Rome. The new CPUs will be announced tomorrow, but got leaked by an anonymous user with an Epyc 7742 which we can only assume is the flagship model of the new series.

Epyc 7742 would get reportedly 64 cores and 128 threads at a base clock speed of 2.25 GHz. The boost clock seems to be 3.4 GHz, a lot higher then what got leaked and mentioned a few months ago. The chip has a staggering 256 MB cache and the TDP would only be 225 Watt.

The new Epyc chip was tested against the previous top model of AMD, the Epyc 7601, and two Intel Xeon CPUs. Both single processors and dual-socket setups have been included in the results. A set-up with two Epyc 7742s has also been tested with an 'RDY1001C' suffix, but what exactly this means is unknown. The scores are no longer online, Tom's Hardware managed to capture them before they were deleted. If the benchmarks (all pro and server-oriented btw) are to be believed then AMD has got a small cannon of a processor at hands.

64-core AMD Epyc 7742 (Rome) CPU Benchmarks leak