@PepperTheVixen Yes, and I do recommend people to get high flow, low resistance, good quality, allergen filters like Car A/C inlet filters and combine them with like 200mm #Noctua #Fans into Cosi-Rosenthal - Boxes to maximize airflow and still yield excellent HEPA ratings without a lot of noise.

Obviously that will be a bit more tricky and require more DIY skills but on the flipside should yield excellent results.

Ich lass mir jetzt für den #Noctua NH-D14 (Kauf: 2011, damals Sockel AM3) schon das zweite gratis Upgrade-Kit zusenden: Das erste war auf AM4 in 2020, das nächste wird auf AM5.
Schon unglaublich, dieser Service.

https://www.noctua.at/en/products/nh-d14

@chrysn @ben @SRAZKVT @chjara
Yes, because for heat exchange you need to aboid laminar flow and encourage turbulent flow to prevent border layers and maximize the Δt [in °C] between intake and exhaust flow and thus increasing the heat efficiency.

• Given the limitations of a finite-sized heatsink that needs to fit into an ATX case with a finite-sized CPU heatspreader and finite-sized heatpipes, #Noctua's NH-P1 basically is peak efficiency for a passive, fanless heatsink.

• OFC when you have a forced, turbulent airflow you can go way closer in terms of fin stack, as you can see with the NH-D15.

As for @N33R's original #shitpost: That "improved" design can't be realidtically manufactured and most mono-material #PassiveCooling heatsinks for electronics like amplifiers also rely on the thermal mass of the heatsink to carry away heat.

• #Yamaha for example in their #amplifiers and stereo systems did optimize passive heat transfer by having widely spaced, mounted-on sheetmetal fins that attached to a big aluminium heatsink with vertical fins to increase heat transfer surface area

• In some models these did literally fill out most of the chassis volume and could thus generste quite a "chimney effect", mandating ventilation openings on the sides and top to be kept clear.