An engineering sample of an upcoming AMD processor has been spotted on UserBenchmark. This particular chip has visited the benchmark before, back in January, but it seems it has received some improvements in the meantime. The sample is believed to be connected to AMD's "Matisse" Ryzen 3000 series of Zen 2 desktop processors.
https://www.notebookcheck.net/12-core-AMD-Ryzen-engineering-sample-rips-through-UserBenchmark-and-scores-over-99.420568.0.html