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Topic: my gtx 1650 low profile card has a dead fan {SOLVEDish} (Read 2223 times) previous topic - next topic
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Re: my gtx 1650 low profile card has a dead fan

Reply #15 –
There's a high probability it will be fine and work perfectly for many years, but fans are often speed controlled by a pulse width modulated output, say it was stuck on full power permanently or the supply was outputting an excessively high voltage due to some regulation issue, something like that could have caused the fan to overheat and fail prematurely, even if it uses the same supply as the other one it could just have been the first to burn out, that was the kind of thing I meant earlier. Wishing you good luck though!  ;D

Re: my gtx 1650 low profile card has a dead fan

Reply #16 –
i think i will repaste my cpu.  there's not much else i can do with the heat it produces,  maybe replace the cpu fan?  it's likely the original fan.  it spins good but i don't think it's blowing like it should either.  i ordered some corsair thermal paste.
Cat Herders of Linux

Re: my gtx 1650 low profile card has a dead fan

Reply #17 –
Quote from: ####### – on
There's a high probability it will be fine and work perfectly for many years, but fans are often speed controlled by a pulse width modulated output, say it was stuck on full power permanently or the supply was outputting an excessively high voltage due to some regulation issue, something like that could have caused the fan to overheat and fail prematurely, even if it uses the same supply as the other one it could just have been the first to burn out, that was the kind of thing I meant earlier. Wishing you good luck though!  ;D
Ty!
Cat Herders of Linux

Re: my gtx 1650 low profile card has a dead fan

Reply #19 –
and so the new fan arrived a few hours ago.  very fast delivery for a fan that doesn't spin.  the old fan spun more than this one.  this one jerks slightly at powwer on but does nothing.  the old fan can be spun a few times manually to spin a little but without power barely moves when manually spun.  The so called new fan spins a little when spun manually without power but does not spin at all under power and spinnng it up manually does nothing.
Cat Herders of Linux

Re: my gtx 1650 low profile card has a dead fan

Reply #20 –
You could check the part number on the fan and see if you can find a datasheet online with the input voltage spec, then you could possibly supply a suitable voltage to test it, and the original too for that matter. It might even have it written on it. If it's not plain DC that could be more difficult, and you might need to have the correct hz as well as voltage.

Re: my gtx 1650 low profile card has a dead fan

Reply #21 –
The new fan has a similar but different font than the one front the card.
Cat Herders of Linux

Re: my gtx 1650 low profile card has a dead fan

Reply #22 –
So a 9 v battery ?  Like for a smoke alarm?  Costs more than I paid for the fan.
Cat Herders of Linux

Re: my gtx 1650 low profile card has a dead fan

Reply #23 –
took a 9v battery from the smoke detector in the hallway.  both fans spin like mad when connected to the 9v battery.  when plugged into the daisey chain the old fan spins up but the new fan does not spin up. so i'm calling the new fan bad and it's probably the connector.


i sent him 3 indignant messages as he requested a video and i thought that was outrageous because what would be the point of that.  it clearly doesn't work and i thought it a beginning of a run around.  but now that you considered an alternate power source and i can show him how his fan clearly doesn't run even when the old jenky fan does i think i'll send him that video.

i'm assuming the 9 volt lithium battery has way more than .19 amps and that it has so much more that the old jenky fan is overpowered by the amps it puts out and runs though with some hesitation.  the replacement fan runs not at all when connected to the daisy chain.  as soon as it is ready ill link the videos.
Cat Herders of Linux

Re: my gtx 1650 low profile card has a dead fan

Reply #24 –
And so i reversed the poles at the battery and then the first fan on the gigabyte chain didnt spin but the new gigabyte fan does.  the new fan is wired backwards.
Cat Herders of Linux

Re: my gtx 1650 low profile card has a dead fan

Reply #25 –
i'm half tempted to cut the wires and resplice them on the new fan.  I just dont have the proper tools to do that right it would be electrical taped at best.  maybe duct taped.  of course i have no guarantee it will run at the proper amperage  supplied by the graphics card.
Cat Herders of Linux

Re: my gtx 1650 low profile card has a dead fan

Reply #27 –
Sounds more promising, some aftermarket replacement CMOS batteries are sold with terminal plugs with the wrong number of pins so you need to solder on the old connector. The fan draws 0.19A at 12V, it would use a bit less current with a 9V supply and run slower. The reason it runs fast is because PWM control switches the voltage supply on and off rapidly  to limit the current and give a method of speed control, probably  the first fan has an extra wire for a speed sensor output:

https://en.wikipedia.org/wiki/Pulse-width_modulation

Without that it would run at max speed when given a 12V constant current supply.
Amps = Volts / Resistance in Ohms
Volts  x Amps = Watts (power) (but if the supply was off for a percentage of time the power would reduce in the same proportion)
In a motor the resistance is mostly inductance giving a resistive equivalent.
The new fan might have tighter bearings which is why it doesn't spin by hand so freely, it could free up more with use.

Re: my gtx 1650 low profile card has a dead fan

Reply #28 –
so is it really that the new fan is wired with the wrong polarity?  the wires reversed?  i think thats what im seeing
Cat Herders of Linux

Re: my gtx 1650 low profile card has a dead fan

Reply #29 –
well there it is i cut the wires and reversed them so both fan ran at the same time and the new fan spins up all nice and pretty
Cat Herders of Linux