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Case fan problem. PWM missing?

G

goblinapoel

Member
Dear all,

I have one question regarding my case fans. I have an old Coolemaster Cosmos case. It came with 4 fans before 5 years i bought it (never replaced them yet). The connectors have 3 wires only (I assume the PWM cable is missing here?)

In BIOS or in FanXpert application in windows, Fan_1 reports 0 or N/A (But I can see that the fan is actually spinning) while others about 500-800 RPM. Can these fans be controlled regarding their speed? Or shall I order new fans which support PWM?

Please enlighten me here please.
 
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