Re: Older CPUs performance on 128 players modes fps drops
Historically, DICE has never released any patches which have increased performance. Usually when DICE patches something, performance decreases instead. 64 player modes is probably the only realistic way to increase framerates.
What's pushing the CPU so hard is mostly the physics calculations for player model animations. Running, jumping, etc for 128 individual players. That's why performance drops so hard in crowded areas with a lot of players. I remember hearing DICE was going to use GPU acceleration for player model animations in 2042, but I guess that either got scraped or it didn't make much of a difference to CPU performance.
After player animations I would guess audio rendering is the 2nd most CPU intensive task in Frostbite. Which is why audio is limited to 20 sound sources.