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6.834 GHz for all cores
Overclocking records are usually set with top-end motherboards, expensive memory kits and better cooling. The SaltyCroissant overclocker record was set on a $110 motherboard.
We're talking about the ASRock B650M-HDV/M.2 board and overclocking the 16-core Ryzen 9 7950X. The enthusiast managed to overclock the processor to 6.834 GHz for all cores, which became a new world record. Moreover, the processor remained stable to pass the 7-zip test, showing a record result of 306,686 MIPS.
Yes, the specified motherboard costs only $110. What is more important for overclocking is the presence of a rather modest power subsystem (8+2+1).