ASRock releases new Intel motherboard with support for both DDR4 and DDR5 memory — The "H610 Combo" features both types of DIMM slots, but you can't mix generations

https://www.tomshardware.com/pc-components/motherboards/asrock-releases-new-intel-motherboard-with-support-for-both-ddr4-and-ddr5-memory-the-h610-combo-features-both-types-of-dimm-slots-but-you-cant-mix-generations