Game Crashing Halfway through Raid and stuttering constantly at start

Hey there,

Basic stuff. Did you try running without any mods?

Also don't launch the launcher before you launch the server

Have you tried toning down any CPU overclocks? My game use to crash because I had an unstable overclock.

A month ago my 9900k was at 5ghz and I was having poor performance and crashes mid raid. The funny thing is my other games didn't seem to be affected. I used many crash fix guides on Google and none of them seemed to work.
I just defaulted my BIOS and the game ran so much better. No more crashes!
I've since overclocked to 5ghz again and everything is holding up great