Hey all, wondering if anyone could shed some light

Basically running siege on the ultra preset like I always have I'm now getting an average of about 65fps as before I remember getting 120+
I use steam fps overlay
Anyone have any ideas to what could be causing this?

My build is

Msi b450 carbon pro gaming
Ryzen 5 1600
Zotac GTX1080 mini 8GB
16gb ram 3000hmz
Kraken m22