The 5800X is a "no man's land" CPU, personally AMD should have skipped it for gaming purposes. The 5600X and 5900X (if you need a workstation as well) are the best choices for gaming. The 5950X will do well but the 5900x will beat it in games most of the time. you're 5800X can be tuned in BIOS, also match your IF to half your RAM speed manually not to exceed 1800Mhz. AMD claimed 1900-2000Mhz IF but most chips aren't going past 1800. Warzone is plagued with complaints anyway, so it might be the game.
You can try tuning the card manually so your clocks are within 100Mhz of each other (min/max GPU) and sliding the power limit to max so the card can use more power as needed. Turn off any zero RPM fan function and set a curve, this limits polling to the card for fan speed/temp. Undervolting for thermals is a good idea. find that lower number by switching to "automatic" mode in performance/tuning, "undervolt GPU" and write that number down, then switch to "manual" mode and allow enable all the disabled items, input the voltage you wrote down. Makes sure the power limit is at max after doing that step. The VRAM can be switched to "fast", why it's not set like that out of box, dunno. These are my settings for my RX6800, so it's only an example of your screen and what you should turn on/adjust per your card. GPU clocks on a 6900 I'd leave stock but move the min to within 100Mhz of max. Doesn't affect idle clock or temps out of game. My games ran smoother after doing that step, then I did the rest.
