CPU Fan Stuttering

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TraumaJustin

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May 17, 2013
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10,510
Hello everyone, I'm in the process of a new build and have a question for you all. I did an external build (just the motherboard, RAM, CPU, CPU cooler fan, PSU, video card, as well as all the various power connections). I assembled everything according to the manual and connected a small speaker to the motherboard for me to be able to hear the post beep. I connected a monitor up to the GPU by a DVI cord and connected all the power cords up to the PSU. I turned on the PSU and the power button on the MB lit up so I hit it. As soon as I hit the power button on the MB some codes came up and cycled through on the Debug LED on the MB. Soon after that I noticed the CPU (stock) fan stutter trying to spin, then about 2 seconds later it did it again. About 2 seconds after that the fan started spinning as well as the GPU fans. At first that were going pretty quick then slowed down to more of a constant speed. As soon as all this happened I heard the post beep and a screen that said something like no bootable device All of this happened in a matter of 10 or so seconds. As far as I heard everything went good by hearing the single post beep and seeing that message come up on the screen but the fan thing was a little weird I thought. I didn't know if this was normal or what. Any reassurance would be much appreciated. Thanks

My Build Consists Of:

ASUS DVD Burner Black SATA Model DRW-24B3ST/BLK/G/AS
CORSAIR Vengeance 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 Desktop
Western Digital WD Black WD1002FAEX 1TB 7200 RPM 64MB Cache SATA
EVGA SuperClocked w/ ACX Cooling 02G-P4-2774-KR GeForce GTX 770 2GB 2GB
SAMSUNG 840 Pro Series MZ-7PD128BW 2.5" 128GB SATA III MLC Internal Solid
Microsoft Windows 7 Professional SP1 64-bit - OEM
GIGABYTE GA-Z87X-UD3H LGA 1150 Intel Z87 HDMI SATA 6Gb/s USB 3.0 ATX
CORSAIR HX Series HX750 750W ATX12V 2.3 / EPS12V 2.91 SLI Ready CrossFire
Intel Core i7-4770K Haswell 3.5GHz LGA 1150 84W Quad-Core Desktop Processor
CORSAIR Hydro Series H80i Water Cooler

 
Solution
clutchc
It all depends what you mean by "stuttering". I'm assuming you mean the fan is constantly stop/starting or fluctuating speeds. That should not be. The fan should come up to speed and stay there while at the POST screen. You might try entering BIOS and see what the CPU fan setting is. Set it to always on/max speed/etc. Reboot. See if the issue is still present.

The BIOS temp is OK but a bit warm for there not being any load on the CPU. But keep in mind, the BIOS temp will normally be warmer than when in Windows because it is running at max freq... may not be going into power saving mode yet while in BIOS.

W/O another fan to test with, you won't know if it is the fan motor or the board that is causing the issue. Can you try...
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clutchc

clutchc

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Apr 22, 2009
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The fan should start to spin w/o 'stuttering'. It should come up to full speed and possibly slow down if the BIOS is set that way. But if it fluctuates its speed constantly, it may be a bad fan motor... or a bad fan controller on the MB. Was that the stock fan you were testing with?
 
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TraumaJustin

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May 17, 2013
16
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10,510
Yes it is the stock intel fan, once I get the case ill put in the h80i, but there was another forum I was on that said it could be bc the CPU hasn't warmed up to the point that it needed to be on would that make sense? But also when I went into the bios the CPU temp was 49 degrees Celsius. Everything posted fine its just that fan stuttering and I figured the temp would of been lower
 
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clutchc

clutchc

Titan
Ambassador
Apr 22, 2009
43,150
411
131,790
It all depends what you mean by "stuttering". I'm assuming you mean the fan is constantly stop/starting or fluctuating speeds. That should not be. The fan should come up to speed and stay there while at the POST screen. You might try entering BIOS and see what the CPU fan setting is. Set it to always on/max speed/etc. Reboot. See if the issue is still present.

The BIOS temp is OK but a bit warm for there not being any load on the CPU. But keep in mind, the BIOS temp will normally be warmer than when in Windows because it is running at max freq... may not be going into power saving mode yet while in BIOS.

W/O another fan to test with, you won't know if it is the fan motor or the board that is causing the issue. Can you try the H80i temporarily to see if it does the same thing or not?
 
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