[SOLVED] PWM Control for Case fan with 2 CPU FAN

[l@cifer]

Hi All,
I am planning on building my first PC. I have shortlisted to the following parts.

• Processor: Intel Core i7-12700F
• CPU Cooler: Noctua NH-D15 Chromax Black
• CPU Cooler Fan: ARCTIC P14 PWM PST 140mm (2x)
• Motherboard: MSI PRO Z690-A ATX LGA1700 Motherboard
• Memory: Corsair Vengeance 32 GB (2 x 16 GB) DDR5-4800 CL40 Memory
• Storage-OS: Western Digital Black SN850 500 GB M.2-2280 NVME Solid State Drive
• Storage-Games: Western Digital Black SN770 1 TB M.2-2280 NVME Solid State Drive
• Video Card: Asus GeForce RTX 3060 Ti 8 GB TUF GAMING Video Card
• Case: NZXT H7 Flow ATX Mid Tower Case
• PSU: Corsair RMx (2021) 850 W 80+ Gold Certified Fully Modular ATX Power Supply
• Wifi: TP-Link Archer TX50E 802.11a/b/g/n/ac/ax PCIe x1 Wi-Fi Adapter
• Case Fan: ARCTIC F14 PWM PST 140mm(6x)
• Case Fan Hub: ARCTIC Case Fan Hub - 10-fold PWM Fan Distributor with SATA Power
• Monitor: LG UltraGear ‎27GN650-B 27.0" 1920x1080 144 Hz Monitor

I have 2 questions that I couldn't get concrete answer for.
1. MSI PRO Z690-A motherboard has 1 CPU_FAN header[PWM], 1 PUMP_FAN header[PWM] & 6 CASE_FAN[DC]. I will be using 2 140mm fans on CPU Cooler. I can connect both the CPU fans to to CPU_FAN & PUMP_FAN header. Then I won't have any PWM header to connect via hub for case fan control. I read on some Q&A that CPU fans should be directly connected to motherboard not via hub. Please advise on how arrange the fan connections so that I can have PWM on both CPU & Case fans. Should I use a fan splitter and connect both CPU fans to CPU_FAN header & the hub to PUMP_FAN header?

2. For maintaining airflow, I am planning on the following Case fan config. Front: 140mm PULL[3x] & Top: 140mm Push[2x] & Back: 140mm Push[1x]. 2 CPU Fans Pull air from case front side and Push towards case back side. Is this config correct or any changes required?

Thanks in advance.

Regards,
Lucifer

 

[Lutfij]

Welcome to the forums, newcomer!

You can have your PWM fan hub connected to the CPU_FAN header on the board, just make sure there's a PWM fan populating the first port on the hub, alongside teh second one on the other port.

 

[l@cifer]

Welcome to the forums, newcomer!

You can have your PWM fan hub connected to the CPU_FAN header on the board, just make sure there's a PWM fan populating the first port on the hub, alongside teh second one on the other port.

Hi,
Thanks for the welcome.

If I can connect the PWM fan hub to CPU_FAN header, Where will I plug the CPU Fans. That too 2 of them. Can I attach both CPU & Case fans to the hub & then connect it to CPU_FAN header?

Regards,
Lucifer

 

[CountMike]

Hi All,
I am planning on building my first PC. I have shortlisted to the following parts.

• Processor: Intel Core i7-12700F
• CPU Cooler: Noctua NH-D15 Chromax Black
• CPU Cooler Fan: ARCTIC P14 PWM PST 140mm (2x)
• Motherboard: MSI PRO Z690-A ATX LGA1700 Motherboard
• Memory: Corsair Vengeance 32 GB (2 x 16 GB) DDR5-4800 CL40 Memory
• Storage-OS: Western Digital Black SN850 500 GB M.2-2280 NVME Solid State Drive
• Storage-Games: Western Digital Black SN770 1 TB M.2-2280 NVME Solid State Drive
• Video Card: Asus GeForce RTX 3060 Ti 8 GB TUF GAMING Video Card
• Case: NZXT H7 Flow ATX Mid Tower Case
• PSU: Corsair RMx (2021) 850 W 80+ Gold Certified Fully Modular ATX Power Supply
• Wifi: TP-Link Archer TX50E 802.11a/b/g/n/ac/ax PCIe x1 Wi-Fi Adapter
• Case Fan: ARCTIC F14 PWM PST 140mm(6x)
• Case Fan Hub: ARCTIC Case Fan Hub - 10-fold PWM Fan Distributor with SATA Power
• Monitor: LG UltraGear ‎27GN650-B 27.0" 1920x1080 144 Hz Monitor

I have 2 questions that I couldn't get concrete answer for.
1. MSI PRO Z690-A motherboard has 1 CPU_FAN header[PWM], 1 PUMP_FAN header[PWM] & 6 CASE_FAN[DC]. I will be using 2 140mm fans on CPU Cooler. I can connect both the CPU fans to to CPU_FAN & PUMP_FAN header. Then I won't have any PWM header to connect via hub for case fan control. I read on some Q&A that CPU fans should be directly connected to motherboard not via hub. Please advise on how arrange the fan connections so that I can have PWM on both CPU & Case fans. Should I use a fan splitter and connect both CPU fans to CPU_FAN header & the hub to PUMP_FAN header?

2. For maintaining airflow, I am planning on the following Case fan config. Front: 140mm PULL[3x] & Top: 140mm Push[2x] & Back: 140mm Push[1x]. 2 CPU Fans Pull air from case front side and Push towards case back side. Is this config correct or any changes required?

Thanks in advance.

Regards,
Lucifer

I would suggest you connect CPU cooler fans to CPU_FAN only. Case fans can be connected thru a hub but I like connecting them all to appropriate headers on the MB if possible.
Reason being that CPU is the one that changes temperature most frequently while case temps have much higher latency and if they are all regulated from same temperature source they would all speed up at same time and make unnecessary noise without helping much.
In your case, since you have 3:1 ratio of intake vs, exhaust fans, I would connect front intake fans to hub and exhaust one to another CHA_Fan header so you can set their curves separately.