The Ryzen 7 3800X supports DDR4 RAM clocked at up to 3.2 GHz, but the Geekbench tests were conducted using only DDR4-2133 RAM. Even so, the AMD chip proves ~5% faster in multi-core tests compared to the Intel i9-9900K coupled with the same DDR4. The AMD chip is also expected to cost almost US$100 less.
https://www.notebookcheck.net/AMD-s-Ryzen-7-3800X-5-faster-than-Intel-s-i9-9900K-in-latest-leaked-Geekbench-tests.424916.0.html