Help Troubleshooting: CPU Stock cooler not spinning in new build

ncumby

Prominent
Oct 14, 2017
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Hello,

I hope I am posting this in the correct location and if not if you could direct me to a better location. I am a computer building newbie, this is my first build ever. So any help is appreciated.

I recently started putting together my new computer:
CPU: Intel - Core i7-7700 3.6GHz Quad-Core Processor
Cooler: Stock cooler
Motherboard: ASRock - Z270 Pro4 ATX LGA1151 Motherboard
RAM: Team - Vulcan 16GB (2 x 8GB) DDR4-3000
Memory Storage: Seagate - Barracuda 3TB 3.5" 7200RPM Internal Hard Drive
Storage 2: Samsung - 850 EVO-Series 500GB 2.5" Solid State Drive
Video Card: EVGA - GeForce GTX 1080 8GB FTW Gaming ACX 3.0 Video Card
Power supply: SeaSonic - G 550W 80+ Gold Certified Semi-Modular ATX Power Supply
Case: Fractal design R5

I assembled the entire build and booted it up and it was able to get into the bios settings screen. However once in these settings, I noticed that all my components were successfully showing up on screen as detected except for the CPU fan. Sure enough when I examined the CPU stock cooler fan, it was not spinning at all and the internal temp was slowly rising. So I shut off the system. I know I don't want to run my PC without the CPU fan working. I checked the connection and tried again. It failed to spin again though my two case fans were spinning no problem. I tried connecting a case fan to the CPU fan header and powering up again and the case fan was able to spin. Based on this information, I am assuming that the motherboard connection for the CPU fan is fine. I also plugged the CPU fan into another fan spot on my Motherboard that worked for the case fan and again it is undetected in bios and fails to spin. Based on this, I am guessing the problem is with the stock cooler fan itself, but being new to this I'd appreciate another opinion. Also if this is the case, how do I solve this problem? Is my only option to get a new cpu fan and try again?

Thanks in advance for the help!
 
Solution
Like mentioned above, you need a replacement fan either from RMA with Intel, or a better choice I think is aftermarket. You did the proper troubleshooting in this case. Either a wire is damaged, or perhaps a bad solder joint within the wiring ends. Benefit of aftermarket is likely lower temps and noise vs. the stock cooler anyways. The added cost is the main negative, though even an RMA of stock cooler could cost shipping on your end.
Like mentioned above, you need a replacement fan either from RMA with Intel, or a better choice I think is aftermarket. You did the proper troubleshooting in this case. Either a wire is damaged, or perhaps a bad solder joint within the wiring ends. Benefit of aftermarket is likely lower temps and noise vs. the stock cooler anyways. The added cost is the main negative, though even an RMA of stock cooler could cost shipping on your end.
 
Solution