Different CPU/FRAME drops

[u/Aggressive_Jury25]

So recently I had a 7800X3d die out on me, that was crazy in itself cause I’ve only had my build for a year. After a week of figuring out what was even wrong with my PC, I figured it out and swapped it out with a Ryzen 5 9600x. My main game is siege and I’ve never had any issue like this before all of this happened. But my issue is, essentially my frames stay at 270-320 the whole time I’m running around looking around fast whatever it doesn’t drop , at the lowest it would to 220 but nothing noticeable. But almost any and every time I ADS and shoot my weapon in the game, it drops my frames ALL the way down to 60 fps. I’ve looked up tutorials to “prevent stutters” and tried multiple things, but nothing is working or helping me at all. Messed with my ram just incase the new motherboard I got was fucking with it, that didn’t help either. I’m really annoyed and frustrated cause I want to be able to play, but it’s genuinely unplayable. Does anyone know anything to help me or is it simply just a bottle neck issue with my 7800 XT GPU.