Can I Connect 3 Pin Fan To 4 Pin Motherboard
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Proper fan connector placement is shown in the figures below.
Can i connect 3 pin fan to 4 pin motherboard. Fans andon board fan headers are backwards compatible. 3 pin connectors are usually used for the smallerchassis fans with lower power consumption. Even if you put a 3 pin fan into a 4 pin motherboard slot you still can control fan speed on whatever motherboard you have. 3 pin fans will power up at 4 pin connectors but only at full speed.
Speed control options rpm range will vary between fans and motherboards on a 3 pin connection but the fan will spin. Fan has a 3 pin power connector. I bought a noctua 2 nh d9l and its fits perfectly in the case however i noticed the motherboard pins for the cpu fan are a 5 pin connection. My rig has 2 pairs of 3 pin fans phanteks ph140sp connected to two 4 pin motherboard headers asus z97m plus via basic y splitters and they work and control just fine.
If you want to use the pwm function then the 4 pin fan must be connected to a 4 pin header on the motherboard. I have a hp z420 and wanted to replace the cpu cooler. If you connect the 4 pin fan connector to a 3 pin header then the fan will run at maximum rpm. There is no fan control.
They are both compatible. This is probably why they are not able to speed control your fan. Pwm fans come with a 4 pin connectors for fully automatic speed control via your mainboard s 4 pin pwm fan headers. Chassis and cpu fans may use either 3 pin or 4 pin powerconnectors.
Just slide the 3 pin and leave the extra pin. When connected to 3 pin fan headers the fan will run at full speed unless the mainboard supports voltage based speed control. Fans and on board fan headers are backwards compatible. You can connect a 4 pin fan to a 3 pin or 4 pin header on the motherboard.
4 pin connectors areusually used by cpu fans with higher power consumption. 4 pin fan controllers hand off the pwm signal to the fan itself and these fan controllers supply an uncontrolled a 12vdc. Is there a possible way to for this to work. The cpu cooler fan i bought is a 4 pin.
When using a 3 pin power connector with a 4 pin fan header the fan will always be on.
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