DDR5 memory has kits rated for up to 8400 Mbps, while desktop CPUs only officially support up to 5600 Mbps. How much does running at official specifications actually impact performance in common content creation applications?

DDR5 memory has kits rated for up to 8400 Mbps, while desktop CPUs only officially support up to 5600 Mbps. How much does running at official specifications actually impact performance in common content creation applications?
The latest Intel 12th Gen processors officially support a range of DDR5 RAM speeds between DDR5-3600MHz and DDR5-4800MHz depending on a number of factors including how many RAM slots are on the motherboard, how many sticks are used, and whether the sticks are single or dual rank. But if you stick with JEDEC specifications for frequency and timing, how much does this actually impact performance in common content creation applications like Photoshop, Premiere Pro, and Unreal?