yes, the CPU slows down... the GPU. Use Vsync in the in-game settings or Radeon-Chill (min60/max 60) in the adrenalin software.
apart from that, World of Warships is only DX11, uses a very old engine. you won't get many more fps with the CPU/GPU, but as written above, cap it at 60fps... that's completely sufficient.
The R5 2600 and RX 6650 XT can exhibit what is known as a "bottleneck" in certain situations. A bottleneck occurs when one component (in this case the processor or the graphics card) limits the performance of the other component. At a screen resolution of 1920 × 1080 pixels (Full HD) for general tasks, the bottleneck is around 29.9%. This means that the processor may not be sufficient to utilize the graphics card's full potential.It is important to note that the bottleneck may be different in different applications and games. In some titles the processor plays a larger role than in others. If you primarily play games, you should also consider the specific requirements of the games you use.
greetings