The other thing I was wondering was DDR5 related performance gains beyond just simply bandwidth.
Two things that Cinebenches do not care about:
1) Memory bw/latency
2) Inter-core comms latency
Basically each execution thread is given a slice of final render that does not depend on results from other threads, that has a rather small and nice spatial and temporal locality working set, that fits L2 caches. And then code that is full of branches is executed. One that does not really use full backend resources of the core due to all mispredicts and stalls and leaves some 20-30% for hyperthreading to extract.
Heaven for ZEN cpus with strong cores and not so good memory subsystem in earlier gens, even abominations that should have never existed like that Threadripper with some CCDs not connected to memory controllers - they got amazing scaling in Cinebenches and horribad results in say compilation or compression.
I think what is happening with Alder Lake - ST: >810 shows that big core is very strong, and other results are not that good cause it is being tested with "stock" DDR5 4800CL66 with Intel "special" BIOS that hurt performance everywhere else, while Cinebenches are immune to those effects.
810 is wow level of performance, Skylake was 500ish land and was premier cpu from Intel sold just last year.