Looking for a CPU cooler for AMD Ryzen 7 9800X3D, which one do you suggest? Air cooler of Liquid cooler?
There is no need for AIO Cooler for 9800X3D. Just get Thermalright Peerless Assassin or Phantom Spirit.
The Peerless Assassin CPU cooler delivers performance comparable to 240mm and sometimes even 280mm AIO liquid coolers, making it a perfectly reasonable choice for high-end cooling needs.
Air cooler is enough for 9800X3D.
If you really want an AIO instead of air cooler, just get the ARCTIC Liquid Freezer III 360.