AMD Ryzen 7 3800X pushed to 5.9 GHz along with DDR4 RAM at 5,774 MHz on LN2, seems to have good potential for an all-core overclock record - NotebookCheck.net News
Latest tests show AMD's Ryzen 9 5900X running stably at 4.82 GHz on all cores coupled with DDR4-3933 RAM - NotebookCheck.net News