Dirt cheap Gigabyte B450 S2H is surprisingly capable of 3800 MHz RAM at 1900 FCLK (even official site only lists DDR4 3600 as a maximum supported frequency) : r/overclocking
XPG and GIGABYTE Work Together to Push the Limits of Overclocking on Intel Z490 and AMD B550 Platforms | TechPowerUp
How to Overclock RAM - Intel
How to Overclock your Ram on the Gigabyte B450M DS3H motherboard - YouTube
How to Overclock DDR4 RAM [Fastest Overclocking Guide 2022]
Tips on safely overclocking memory – Corsair
First time memory overclocking with Samsung B-die on 12700k with Gigabyte Z690I (T26 BIOS) : r/overclocking
How to Overclock DDR4 RAM [Fastest Overclocking Guide 2022]