Item Tag: TL-B4020

Thermalright TL-B4020 40mm PWM Case Fan 5500RPM Double Ball Bearing Quiet PC

Thermalright TL-B4020 40mm PWM Case Fan. ✓ 1x Thermalright TL-B4020 40mm PWM Fan. Connector 4-Pin PWM. Fan Size 40mm x 40mm x 20mm. 🔧 Compact 40mm Design. A: Yes, the 4-pin PWM connector allows your motherboard to automatically adjust fan speed based on temperature, or you can set custom curves in BIOS.