RTX 3090 GETTING 120FPS ON HIGH/LOW SETTINGS WARZONE 1080p ?

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Hello guys so i am suffering from low fps in cod warzone and some other titles too, but warzone seems to be the biggest issue for me at the moment. I run at 1080p and have tried putting my settings to highest setting and lowest setting and only seem to get 10fps difference. I upgraded from a 2080 and have only gained around 10fps. Im not sure if my CPU is bottlenecking or something but no matter what i try i cannot get FPS no matter what. I have seen people pulling the same fps as me with similar rigs on 4K, i dont know what im doing wrong at this point.

My Rig;
RTX 3090
Ryzen 9 3950x
32gb 3600mhz corsair vengence
ROG Strix X570-F
M.3 NVME SSD 1TB
Thermal Take 360mm Water Cooler
Corsair Fully Modular Gold certified 650W PSU

Thanks

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