The system reportedly uses a B450 Aorus M board, not an X570 board. According to the reported clock speed, the CPU doesn't seem to be overclocked either; all three tests show the same turbo of 4.21 GHz, and one result shows a "measured speed" of 3.37 GHz, and the other two 3.61 GHz. It doesn't seem like there was some sort of trick making this 3600 so fast, at least not something we can glean from Passmark's reported information.
Interestingly, the third benchmark for the 3600 uses a 16GB kit of 3200 MHz CL14 G Skill RAM, unlike the first two benchmarks which used a single stick of Crucial RAM at 2666 MHz CL16. The third benchmark reports a score of 7% faster than the two previous scores, which implies that Zen 2 and/or Passmark benefits heavily from having high-speed low-latency dual-channel RAM, something which previous iterations of Zen also benefit from.