Summary of Reddit Comments on AMD Silent CPU Coolers

Recommendations for Silent CPU Coolers

Noctua NH-D15 or a new Thermalright Peerless Assassin are recommended for a quiet cooling experience: "No need for water cooling with that chip, it's a little warm but nothing crazy."
Other silent CPU cooler suggestions include Deepcool AK620, Phantom Spirit, and Peerless Assassin.
Arctic Liquid Freezer II 360mm with fan swaps for quieter ones can provide excellent cooling with minimal noise: "Mine keeps my 58x3D at 35-38c idle and maxes out at 78c with Furmarks CPU burner. And nearly silent."
Scythe Fuma 2 Rev B and Scythe Fuma 3 are praised for being very quiet and high-performing air coolers.
Thermalright Phantom Spirit is highlighted for being quiet compared to the noise from other system components.
Be Quiet Dark Rock Pro 4 or 5 are recommended for their quiet operation.
Noctua DH15 is another popular choice for a silent CPU cooler.
Thermalright Frost Spirit offers similar performance and sound profile as NH-D15 at a lower cost.
Scythe Big Shuriken 3 is suggested for its low profile and performance capabilities: "69mm tall and should out-perform both of these."
Alpenföhn Black Ridge in a dual push-pull fan configuration is recommended for those looking to try something different.

Customizing Fan Curves for Silence

User shared their custom fan curve settings to balance noise and temperature: 40% at 70C, 45% at 80C, 50% at 85C, and 100% at 90C.
Eco mode is suggested for keeping the CPU cooler while achieving quieter operation: "5800X likes to get hot and those air coolers won't be able to tame 5800x at 110W."
Customizing fan curves personally can make most coolers near silent: "Set the max fan speed to around 50ish percent or less with good case airflow."
Mention of optimizing fan layouts to achieve the best cooling potential by matching internal air temperature with ambient room temperature: "Best fan config would be as few exhausts as you need, such as one or two, and the rest intakes."

User Experiences with Silent CPU Cooling Solutions

Noctua L12S has been effective for maintaining low noise levels: "It's so quiet I can't even hear it at full speed."
Thermalright AXP120 kept a 5900X cool during gaming and regular tasks: "Works for my use cases."
Deepcool AN600 and Noctua L12S were praised for their performance and quiet operation.
Scythe Big Shuriken 3 and Thermalright AXP 120X67 were recommended for their cooling efficiency.

Advice on Noise Reduction and Cooling Efficiency

Optimal Fan Curves: Different setups may require varying fan curves based on components, environment, and cooling needs: "To find the optimal for your system, cycle through all PWM levels."
Recommendations for keeping noise levels low include setting the fans at full speed during gaming and adjusting back to quieter settings afterwards.

In conclusion, users recommended a variety of silent CPU coolers, shared experiences with fan curve customization for quieter operation, and provided insights into optimizing fan layouts for efficient cooling and reduced noise levels.