a 4pin PWM fan can still run through a 3pin DC header, there will just be no option to set a custom PWM curve.can I connect a 4-pin case fan into a 3-pin
Motherboard: P35-DS3 rev 2.1Maybe.
More information needed:
Full system hardware specs and OS information.
Motherboard, CPU, GPU, RAM?
PSU?
Disk drive(s)?
Fans?
Case?
The answer is likely in the documentation.
Especially for proprietary devices and connections.
Pin by pin.