Thermalright TL-B4020 40mm PWM Case Fan 5500RPM Double Ball Bearing Quiet PC
July 2, 2026
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.
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