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Connection between liquid cooler system an MOBO.

vasuma123

1 month ago

PCPartPicker Part List

Type Item Price
CPU Intel Core i9-9900K 3.6 GHz 8-Core Processor $494.99 @ SuperBiiz
CPU Cooler NZXT Kraken X72 Liquid CPU Cooler $169.49 @ Amazon
Motherboard Gigabyte Z390 AORUS ELITE ATX LGA1151 Motherboard $175.98 @ Newegg
Memory Corsair Vengeance RGB Pro 32 GB (2 x 16 GB) DDR4-3200 Memory $169.99 @ Amazon
Memory Corsair Vengeance RGB Pro 32 GB (2 x 16 GB) DDR4-3200 Memory $169.99 @ Amazon
Storage Samsung 970 Evo 1 TB M.2-2280 NVME Solid State Drive $149.99 @ Amazon
Video Card Gigabyte GeForce RTX 2080 Ti 11 GB AORUS XTREME Video Card $1299.99 @ Newegg
Case *Cougar Panzer Max ATX Full Tower Case $136.99 @ Amazon
Power Supply *EVGA SuperNOVA G2 750 W 80+ Gold Certified Fully Modular ATX Power Supply $179.98 @ Amazon
Operating System *Microsoft Windows 10 Pro OEM 64-bit $139.99 @ Other World Computing
Monitor LG 32UD59-B 32.0" 3840x2160 60 Hz Monitor $299.99 @ B&H
Prices include shipping, taxes, rebates, and discounts
Total $3387.37
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2019-12-05 14:28 EST-0500

I have completed assembly of PC using this parts list already. Everything works fine. CPU temperature hovers around 30C. What is nagging me is that I am not sure if I fully utilize interface between Z390 AORUS Elite MOBO and NZXT Kraken X72 liquid CPU cooler. MOBO has 3 options for connecting liquid cooler:

CPU_FAN CPU_OPT (Water cooling CPU header) SYS_FAN1/2/3_PUMP (System Fan/Water Cooling Pump Headers)

All 3 options have the same pinout:

Pin1 GND Pin2 Voltage speed control Pin3 Sense Pin4 PWM speed control

NZXT told me to connect pump tach cable to connector number 1. Their connector has only 2 cables going to PIN1 and PIN3. Then obviously it does not matter where I plug it since only PIN 1 and PIN 3 are connected. My question is what is the purpose of the pin2 and 4? It seems to me that Z390 can do some additional control of liquid cooling system and I am not utilizing it. Should I purchase another liquid cooling system which is utilizing all pins on MOBO to achieve better cooling performance? And what it would be? Thank you.

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