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Intel Stock CPU Fan low speed? - Page 2

post #11 of 13
Quote:
Originally Posted by cmpxchg8b View Post

@doyll - I sold AMD stock cooler long ago, but from what I remember, the sensor is a tiny thing sticking from the side of PCB in the fan motor. It touches the airflow this way. I realized what that is when I flipped the fan over and it started spinning incredibly fast. Reason is, it sucked hot air from the heatsink and blew it upward, and this way the sensor was touching the hot air. In normal orientation, the fan blew downward, and the sensor was touching fresh air. Don't remember what the range was, but when the sensor was heated by hot air, the fan was pretty much sounding like a small jet engine.
Thanks! thumb.gif
Not much, but much more than I knew befoe. tongue.gif
post #12 of 13
Quote:
Originally Posted by doyll View Post

I have to respectfully ask what coolers have fans that are thermistor controlled?

I recall most of the Intel and AMD stock coolers I had from the 2004-2010ish era having some sort of thermistor; I don't have many CPUs that came with stock coolers after this point.

I'll see if I can dig up an example and take a picture of the thermistor.
Quote:
Originally Posted by cmpxchg8b View Post

@doyll - I sold AMD stock cooler long ago, but from what I remember, the sensor is a tiny thing sticking from the side of PCB in the fan motor. It touches the airflow this way. I realized what that is when I flipped the fan over and it started spinning incredibly fast. Reason is, it sucked hot air from the heatsink and blew it upward, and this way the sensor was touching the hot air. In normal orientation, the fan blew downward, and the sensor was touching fresh air. Don't remember what the range was, but when the sensor was heated by hot air, the fan was pretty much sounding like a small jet engine.

Yeah, the little green encapsulated nub sticking out of the side was the thermistor, and you couldn't get the fan to full speed if intake air was too cold. I used to break them off and short the contacts to use a fan controller with them.

I seem to recall something similar on some Intel coolers, though it was on the motor's PCB, and didn't protrude.
Edited by Blameless - 10/25/15 at 7:10am
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5820K @ 4.2/3.5GHz core/uncore, 1.175/1.15v Gigabyte X99 SOC Champion (F22n) Gigabyte AORUS GTX 1080 Ti (F3P) @ 2025/1485, 1... 4x4GiB Crucial @ 2667, 12-12-12-28-T1, 1.34v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.06) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Noctua NH-D15 
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post #13 of 13
Quote:
Originally Posted by Blameless View Post

I recall most of the Intel and AMD stock coolers I had from the 2004-2010ish era having some sort of thermistor; I don't have many CPUs that came with stock coolers after this point.

I'll see if I can dig up an example and take a picture of the thermistor.
Yeah, the little green encapsulated nub sticking out of the side was the thermistor, and you could get the fan to full speed if intake air was too cold. I used to break them off and short the contacts to use a fan controller with them.

I seem to recall something similar on some Intel coolers, though it was on the motor's PCB, and didn't protrude.
Thanks for the info. Always enjoy learning new things .. even if am skeptical at first. redface.gif
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