Impact of memory speed on overall performance, are there any concrete benchmarks?

I am currently using DDR5 4800 memory with the 7840u, as I already had a 32gb sodimm salvaged from another computer, and while it seems like the consensus with this chip generation that memory speed is impactful for performance, I’ve been having a hard time finding any concrete numbers for exactly (or even roughly) how much that impact is in a real world scenario, like in compilation times, or video game performance, where the igpu would be affected. If anyone has wondered the same thing and found anything insightful I would appreciate the knowledge. With black friday coming up soon it would be great to know if picking up 5600 is worthwhile or wasteful

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watching. I’d also be very curious to see any benchmarks regarding this.