Call of Duty / Warzone does not work well on the 5000 series. I tested an RX 5500 XT and now I am testing an RX 5600 XT and the game is going really bad. Freesync does not work on this game at all. Neither does enhanced sync. Even turning off these features, the game has no fluidity, has constant sutterings. Testing on an RX 570, all of these problems disappear.
Pay attention to that! Will we consumers have to beg to use resources that you have so many exploited in your marketings?
Ryzen 5 1600 stock
16GB RAM 2400 mhz stock
Corsair CX 500
RX 5600 XT Windforce Gigabyte
Monitor PMU-24-IPS-01 Freesync 75Hz
Windows 10 Pro 2004
Lots of disappointments with Radeon cards.
R9 Fury should be strong but drivers to this day are just not cutting it. It manages 7 TFLOPS or so.
Vega 64 should be strong but again another disappointment, It does managed 12 TFLOPS but game performance is horrible/
My RTX 2080 is 10 TFLOPS but it is excellent for games with good driver support. It even beats Radeon VII with games.
I have the same GPU as you and I have the same problem. I play competetive so I put my settings on competetive settings and I'm only running on 80 to 90 fps on almost low everything. I have done a lot of research about this and I saw that Warzone is CPU intensive. I have a Ryzen 5 2600 and 5600 XT and my friend have the same GPU but he got a 3600 and he run smoothly on 100+ FPS. So yeah If I were you I highly suggest to get a new CPU and make sure it 3600 and above. Hope this helps you and everybody else who is struggling with the same problem