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[MSI Z87 G-45 + Fractal Design Define R4] System Fans Into MoBo or Case Switch?

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May 13, 2014 7:04:12 PM

I just built my first gaming PC and want to make sure I don't make any beginner mistakes with regards to cooling. I am not sure if it is better to plug my system fans (x2) directly into my motherboard's (MSI Z87-G45) sysfan connectors or into the switches on the case which are connected directly to the PSU.

I am not entirely sure if my MoBo will regulate the fans based on temperature but it appears it might from this screen shot of a BIOS menu (http://www.hardwareheaven.com/reviewimages/msi-z87-g45-...).

Even if the MoBo can control the case fans, would it be more advantageous to use that or the bypass and controller switches on the case?

Additional Information:
I followed this advice while building but would like to confirm the best choice and why.
(http://www.tomshardware.com/forum/366264-28-help-fracta...)

My Build:

PCPartPicker part list: http://ca.pcpartpicker.com/p/3J9l3

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor
Motherboard: MSI Z87-G45 Gaming ATX LGA1150 Motherboard
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory
Storage: Samsung 840 EVO 250GB 2.5" Solid State Disk
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: EVGA GeForce GTX 770 2GB Superclocked ACX Video Card
Case: Fractal Design Define R4 (Black Pearl) ATX Mid Tower Case
Power Supply: Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply

Thanks in Advance!:) 
a b 4 Gaming
a c 487 V Motherboard
May 13, 2014 7:32:08 PM

I would use the case controller. The MB's sys fan headers all look to be 4 pin PWM. On most boards with PWM SYS FAN headers, the BIOS can't control the fan RPM when you are using 3 wire fans. So if your's are 3 wire fans, use the case controller if you want to control RPM. If the fans are PWM fans, use the headers so you can monitor fan RPM.
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May 13, 2014 8:07:19 PM

clutchc said:
I would use the case controller. The MB's sys fan headers all look to be 4 pin PWM. On most boards with PWM SYS FAN headers, the BIOS can't control the fan RPM when you are using 3 wire fans. So if your's are 3 wire fans, use the case controller if you want to control RPM. If the fans are PWM fans, use the headers so you can monitor fan RPM.


How can I confirm if the MB sys fan headers are 4 pin PWM?
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Best solution

a b 4 Gaming
a c 487 V Motherboard
May 14, 2014 7:26:37 PM

If they are 4 pin headers, they are PWM.
You can still use 3 wire fans, they just won't be speed controlled by BIOS.
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