I have seen so many mixed messages. Some say Alder Lake even in multi threaded workloads blows Zen 3 out of water and especially more so on IPC.
Though many say IPC is only 11% better at same clock speed and not very universal and sometimes even Zen 3 pulls ahead in IPC depending on software.
Though the strange thing many benchmarks so 12900K ahead of 5950X sometimes by a lot in multi threaded work which is strange since supposedly those e cores are so much weaker than Zen 3 and Intel P cores. And independent tests show the e cores are meh at best when trying to run certain things on them.
www.techspot.com
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https://www.tomshardware.com/news/intel-core-i9-12900k-vs-ryzen-9-5900x-5950x
chipsandcheese.com
A lot of it is so complicated and hard to understand.
It does seem Alder Lakes biggest advantage especially when it pulls ahead in multi threading is likely because the P cores default turbo so much higher clock speed than Zen 3 CPU cores temps by darned unless they hit 100C or higher. And those much higher clocks probably compensate for the much lower default clocks on Zen 3 all core workload to help it pull ahead with 11% higher IPC even with only 8 strong cores and 8 much weaker cores with much worse IPC and a max clock of like 4GHz.
Your thoughts.
Though many say IPC is only 11% better at same clock speed and not very universal and sometimes even Zen 3 pulls ahead in IPC depending on software.
Though the strange thing many benchmarks so 12900K ahead of 5950X sometimes by a lot in multi threaded work which is strange since supposedly those e cores are so much weaker than Zen 3 and Intel P cores. And independent tests show the e cores are meh at best when trying to run certain things on them.

Intel 12th-Gen Core Alder Lake Architectural Benchmark
As a follow up to our feature on how CPU cores and cache impact gaming performance, we're testing different Intel 12th-gen Core Alder Lake CPUs configurations to...
https://www.tomshardware.com/news/intel-core-i9-12900k-vs-ryzen-9-5900x-5950x

Popping the Hood on Golden Cove
Alder Lake (ADL) is the most exciting Intel launch in more than half a decade. For the first time since Skylake, Intel has launched a competitive desktop microarchitecture. But I’m sure you a…

A lot of it is so complicated and hard to understand.
It does seem Alder Lakes biggest advantage especially when it pulls ahead in multi threading is likely because the P cores default turbo so much higher clock speed than Zen 3 CPU cores temps by darned unless they hit 100C or higher. And those much higher clocks probably compensate for the much lower default clocks on Zen 3 all core workload to help it pull ahead with 11% higher IPC even with only 8 strong cores and 8 much weaker cores with much worse IPC and a max clock of like 4GHz.
Your thoughts.