Noctua 6x25 Ender 3 V3

Hey so I upgraded my mainboard 6x15 24V with a Noctua 6x25

12V and used a normal Buck converter. The problem is that the Noctua fan is guess spins to slow and promptly after starting the printer i get an error message that the mainboard fan accounted an issue regarding the speed. My question is how can I stop this from happening it doesn’t effect the print or stops the printer from printing but in the app it logs out my printer and I cant get it to reconnect until I swap the fans again.