If anyone is interested, Zen 3 5600x 3200mhz DDR4 finished replay on 13:50~. Lowest speed was around +2/+3, dropped for a sec to +1 on air fight. In lobby benchmark gives 100~ score. No overclock on cpu overall.

I think similar results can be achieved with newest intel cpus, as I would assume most of it comes from good IPC in recent gen cpus.

Fast RAM is good addition, but to be fair, I used the same setup for DDR4 on Zen 1700 3.7ghz OC, and lobby benchmark was around 240~ and I was dropping to -1 on somewhat big games and air fights. Big jump in IPC in last two CPU gens is what's helping the most.

I think with Zen 4 and DDR5 in 2022, all cpu issues in FAF will be solved, even cheapest cpu from it will be enough to run everything smoothly. But sadly, everyone would need to get new cpus, and that won't happen for years.