Possible Fix for Fx6300 users
Possible fix for atleast fx6300 users so setting your game to using 4 cores seems to have stabilized the game. Using process lasso to save the settings, your going to want to set the cpu affinity for your first 4 cores those being cores 0-3. You will need to change the cpu affinity for the following programs easyanticheat launcher, easyanticheat service, and finally apex legends. You will have to change the affinity for easyanticheat launcher while the game is booting when you see the first window booting eac thats when you will have to set the affinity or atleast select the program to start changing the affinity its okay if the eac launcher finalizes as long as you select the program and start changing the affinity in process lasso. after that restart the game.
Credit for finding this fix goes to user @BluesAdamfor bringing it to my attention and @THUNDERDOMEPLS for the original post i just automated it with process lasso so you don't have to change windows boot options to only boot with 4 cores or bios options for those of that dont want to possibly destabilize an overclock or dont want to mess with your bios.
eac stands for easyanticheat
This post will be updated if i crash in game along with how long it took before a crash.
crash edit - I crashed after playing stable for 4 hours so it is possible it was caused by some other problem then what i was experiencing for example could have been a random crash that everyone experiences now and then as the game is still new, before as i was crashing every game to every 2 games i would still say that this is worth a shot.
edit 2 - I've gone ahead and set the processor affinity for every process related to apex so the one listed before and origin along with OriginWebHelperService and that seems to have helped the in lobby crashing i was able to sit in a lobby for 29 min before getting the disconnect. going into the game menus while in lobby seems to cause crashes more frequently in 1 hr of sitting in the lobby i crashed 3 times 2 of those was when i went into a menu like the legends menu or store so i wouldn't get disconnected due to inactivity.
I've gone ahead and made a video for the sake of simplicity and for those who find it easier to watch a video - https://youtu.be/2X3pjjfHUMw
try this method instead no core limiting or downloads - https://answers.ea.com/t5/Technical-Issues/Possible-crash-fix/m-p/7534180#M22660