2Pcs 40x40x20mm 40mm 12V 4Pin PWM Silent Cooling Fan, Replacement EF40201B1Q01CS99 1.28W Mute Quiet Fan for Computer Case Small Equipment Cooling

This listing includes two pieces of 40x40x20 mm 12V 4Pin PWM silent cooling fans, highquality replacement compatible with model EF40201B1Q01CS99, rated power 1.28W. Compact 40 mm form factor is suitable for small computer cases, servers, industrial control equipment and other compact devices where space is limited.

Adopting optimized fan blade structure, it delivers sufficient airflow while maintaining lownoise mute performance, suitable for working environments requiring quiet operation. Standard 4Pin PWM header supports motherboard automatic speed adjustment, rotating speed changes according to internal temperature to balance heat dissipation and noise level. Sturdy frame and reliable bearing ensure longterm continuous stable operation. Simple plugandplay setup without extra modification. Great for old fan damage replacement and system heat dissipation upgrade. Please verify dimension, voltage, power and pin definition of your original fan before purchasing to guarantee compatibility.