The constant jumping of RPM when using default CPU fan settings really bothered me, so I came up with this custom one. Is it good/safe (Ryzen 5 3400G with stock cooler) :
Cooler Master DF1202512RFLN 800-2000 RPM DC 12V 0.16A 120X120X25mm 4-Wire Server Cooling Fan - AliExpress
Cooler Fan Icegale Xtra Pwm 140mm Preto 2500 Rpm 169 Cfm
Cooler Gabinete Ou Cpu 2500 Rpm Silencioso Vento Forte | Parcelamento sem juros
Cooler Fan 80mm 1100rpm KNUP: Refrigeração Silenciosa
Cooler xfan fan 120x25mm 1300 rpm s/pwm pt - DeepCool - Peças para Computador e Notebook - Magazine Luiza
AMD Wraith Stealth Cooler, 4-pin PWM Connector, AM4 Socket, 2800 RPM | 712-000052 Buy, Best Price. Global Shipping.
1pcs Cpu Cooling Fan Radiator Heatsink Cpu Cooler Hydraulic Bearing 2400 Rpm For Lga 775 1150 1155 | Fruugo PT
SickleFlow 120 2000 RPM | Cooler Master
Mars Gaming MCPUARGB Ventoinha para PC Processador Cooler 9 cm 800-2200 RPM RGB Auto Chroma PWM Fan 2x High Power Preto - 4710562759341 | Disponível ao melhor preço Net7
Filfora Air Cooler and Exhaust Fan Motor 22 Watts and 2800 RPM : Amazon.in: Home & Kitchen
Amazon.com: AAAwave 120mm 2500 RPM PWM Daisy Chain Double Ball Bearing Powerful Cooling Fan for GPU Mining Rig, CPU Cooler, Water-Cooling Radiator, Server and Case (1-Pack) : Electronics
105 W Cooler Motor, 1350 rpm at Rs 1099/piece in Patna | ID: 2850024457297
Testing Results, Maximum Fan Speed (12 Volts) - Battle of The CPU Stock Coolers! 7x Intel vs 5x AMD, plus an EVO 212
Cooler FAN Gelid GALE PWM 120mm 3500 RPM 110 CFM - Empresa líder na comercialização de soluções térmicas, incluindo Pasta Térmica, Thermal Pad, Coolers e Fans.
Cooler FAN Alta Performance 80mm 12V 1500 Rpm Dex - DX-8C - Bem-vindo à Gibson Tecnologia
8cm Pc Computer Cpu Cooling Fan 2200 Rpm Speed Silent Cooler, 3 Pin | Fruugo PT