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Weird “problem” with fans of my psu

ItzRuben
By ItzRuben
in Power Supplies
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Hi,

 

I got a working be quiet psu for free from a friend, but there’s one thing I don’t understand.. When flipping the switch on the psu the fans spin for around 2 minutes en than stop. Same thing happens when the pc is just turnt off.

Does anyone know if it’s a defect or a feature?


btw it’s a bqt p5-420w-s1.3

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12 minutes ago, ItzRuben said:

Does anyone know if it’s a defect or a feature?

Its a feature to make the fans spin less so its silent.

 

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9 minutes ago, sub68 said:

Its a feature to make the fans spin less so its silent.

 

Also when the pc is turned off?

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Just now, ItzRuben said:

Also when the pc is turned off?

if your pc is turned off the psu is off

Everyone, Creator - 初音ミク Hatsune Miku Google commercial.

 

 

Cameras: Main: Canon 70D - Secondary: Panasonic GX85 - Spare: Samsung ST68. - Action cams: GoPro Hero+, Akaso EK7000pro

Dead cameras: Nikion s4000, Canon XTi

 

Pc's

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Dell optiplex 5050 (main) - i5-6500- 20GB ram -500gb samsung 970 evo  500gb WD blue HDD - dvd r/w

 

HP compaq 8300 prebuilt - Intel i5-3470 - 8GB ram - 500GB HDD - bluray drive

 

old windows 7 gaming desktop - Intel i5 2400 - lenovo CIH61M V:1.0 - 4GB ram - 1TB HDD - dual DVD r/w

 

main laptop acer e5 15 - Intel i3 7th gen - 16GB ram - 1TB HDD - dvd drive                                                                     

 

school laptop lenovo 300e chromebook 2nd gen - Intel celeron - 4GB ram - 32GB SSD 

 

audio mac- 2017 apple macbook air A1466 EMC 3178

Any questions? pm me.

#Muricaparrotgang                                                                                   

 

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24 minutes ago, sub68 said:

if your pc is turned off the psu is off

I know, but the fans will keep spinning on the psu for around 2 minutes

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48 minutes ago, ItzRuben said:

I know, but the fans will keep spinning on the psu for around 2 minutes

probably because its on a power down phase

Everyone, Creator - 初音ミク Hatsune Miku Google commercial.

 

 

Cameras: Main: Canon 70D - Secondary: Panasonic GX85 - Spare: Samsung ST68. - Action cams: GoPro Hero+, Akaso EK7000pro

Dead cameras: Nikion s4000, Canon XTi

 

Pc's

Spoiler

Dell optiplex 5050 (main) - i5-6500- 20GB ram -500gb samsung 970 evo  500gb WD blue HDD - dvd r/w

 

HP compaq 8300 prebuilt - Intel i5-3470 - 8GB ram - 500GB HDD - bluray drive

 

old windows 7 gaming desktop - Intel i5 2400 - lenovo CIH61M V:1.0 - 4GB ram - 1TB HDD - dual DVD r/w

 

main laptop acer e5 15 - Intel i3 7th gen - 16GB ram - 1TB HDD - dvd drive                                                                     

 

school laptop lenovo 300e chromebook 2nd gen - Intel celeron - 4GB ram - 32GB SSD 

 

audio mac- 2017 apple macbook air A1466 EMC 3178

Any questions? pm me.

#Muricaparrotgang                                                                                   

 

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13 hours ago, ItzRuben said:

btw it’s a bqt p5-420w-s1.3

That PSU is more than 15 years old. Free or not it's not worth using such an old PSU.

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On 11/19/2020 at 12:15 AM, ItzRuben said:

I know, but the fans will keep spinning on the psu for around 2 minutes

some psu have thermal venting implemented, and it will keep spinning fans even after you turn off power to cool down PSU. 

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On 11/22/2020 at 12:27 AM, RainingTacco said:

some psu have thermal venting implemented, and it will keep spinning fans even after you turn off power to cool down PSU. 

Yup that’s exactly what I found out, thanks for replying

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On 11/18/2020 at 2:25 PM, ItzRuben said:

Hi,

 

I got a working be quiet psu for free from a friend, but there’s one thing I don’t understand.. When flipping the switch on the psu the fans spin for around 2 minutes en than stop. Same thing happens when the pc is just turnt off.

Does anyone know if it’s a defect or a feature?


btw it’s a bqt p5-420w-s1.3

You realize he gave it to you because he doesn't want to risk using it himself.

 

It needs to go to an e-waste recycler.

 

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On 11/19/2020 at 3:25 AM, ItzRuben said:

bqt p5-420w-s1.3

Holy cow, i'd surprised if it works at all at this point.

Tag or quote me so i see your reply

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