What cooler does Ryzen 5 7600X3D need, and how do gaming and sustained all-core loads differ?

  A 6-core X3D draws little power: a mid-range tower is enough and a 360mm is far beyond need. In games it runs cooler than the 8-core X3D parts.

  A 100–200 CNY cooler budget is the ceiling; put the savings into the GPU. Sustained all-core loads will show higher readings from heat retention, but if clocks hold, nothing needs attention.