Palit RTX 3060 Possessed fan .. Intermittant control

[90Ninety]

So I purchased a faulty GPU on ebay Palit RTX 3060 .. It had a broken fan ( it did not spin at all )

Long story short , is the PWM control of the Card seems to be intermittantly faulty

Long story
I replaced said fan , seemed to work for a while , until randomly the fan starts spinning at 100% ( around 3.2K RPM ) for no rational reason ( temps and performance are ok ) . Now fan spins , though several times a day the fan decides to run at 100% for several minuites a time .. Then resumes normal operating ..

bear in Mind the card can be cooled sufficiently at 60 % , so no reason to be 100%

Things I have tried

Resoldering the GPU terminal
Replacing fan
Reflashing VBIOS
MSI afterburner
Fan Control V187


Nothing seems to fully remedy this weird fan problem . Is it possible just to replace a chip , like a PWM chip ? I am unsure if a chip like that exists on this card


I know I could connect the fan to the motherboard , but I would rather connect to the GPU

[прямо]

It doesn't have a PWM chip. The PWM signal is generated by using a mosfet and some transistors logic.

The symptom you described doesn't sound like a faulty PWM, but rather a faulty thermal sensor that will occasionally "sense" the GPU core temperature has crossed over the threshold and the fan has to run at 100% speed, when in fact everything is cool.

[ktmmotocross]

pwm is generated by core and goes through buffer/AND gate/ to fan.

[90Ninety]

It doesn't have a PWM chip. The PWM signal is generated by using a mosfet and some transistors logic.

The symptom you described doesn't sound like a faulty PWM, but rather a faulty thermal sensor that will occasionally "sense" the GPU core temperature has crossed over the threshold and the fan has to run at 100% speed, when in fact everything is cool.

Interesting

Though , if the sensor was faulty then wouldn't the temperature be wrong ? The temps seem normal


Is it worth trying a reflow on this card ?

[прямо]

Interesting

Though , if the sensor was faulty then wouldn't the temperature be wrong ? The temps seem normal


Is it worth trying a reflow on this card ?

Why would you wanna risk a reflow over a silly fan problem?

It's not like the fan always spins at 100% speed all the time, is it?

And if you just want a constant 60%-65% speed, detach the PWM wire, and add a DC step down module like the "mini 360" to lower the 12V going to the fan.