Q&A: Will DDR3-1600MHz RAM work with my DDR3-1333MHz motherboard?
Motherboard says it only supports 1333 RAM, but I've installed 1600 mhz ones. Should I downclock my RAM? - CPUs, Motherboards, and Memory - Linus Tech Tips
Boost Your Laptop's Performance With Ddr Memory: 4gb, 8gb, 16gb, 1600mhz, 1333mhz, 1866mhz, 1.35v/1.5v, 204 Pins - Temu New Zealand
Buy Wholesale China Computer Accessories Memory Ram Ddr3 4gb 1333mhz 1600mhz Ram Memory For Desktop & Ram at USD 5 | Global Sources
ASRock Motherboard showing 1600mhz RAM running at 1333mhz, BIOS not letting me change it : r/techsupport