Well... here are a list of things to check:
a) Check the nvidia control center to make sure its not forcing AA or anything
b) Check your ram while playing games to make sure something else isn't running in the background or your ram isn't getting full
c) Windows Indexing Service can cause lag so see if that is off
d) Make sure you have Windows Defrag schedule off or else it will keep on trying to defrag ur hard drive
e) Run msconfig and go to startup tab and start disabling most of the services that you think are unnecessary (if you disable all it wont do anything bad to ur pc unless your disabling MS ones)
What OS do u have? Also make sure you have Direct X and Drivers up to date
Edit: Also see if you have vsync on... and turn that off to see if it helps
PC Specs: CPU: 7800X3D || GPU: Strix 4090 || RAM: 32GB DDR5 6000 || Main SSD: WD 2TB SN850







