PSU connected and ON yet the fan inside wont move?

[PMussack]

It's my first time building, and I'm wondering if it's normal that my PSU is directly connected to a power cable yet the "fan" inside it wont move? Is this normal? Thanks on advance for answers!

 

[Dunlop0078]

What psu do you have? It probably just doesn't turn on until the psu reaches a certain temp.

 

[Archaic59]

If you suspect a hardware problem....list all your hardware 😉

 

[jimmysmitty]

Most newer PSUs, of good quality, has a low power mode, basically unless the PSU hits a certain load the fan will not start to spin. If you just power it on without any load, a power on test, it will not spin.

For example, my Corsair AX860is fan will not start spinning until it gets to higher than 20% load so 172w which is well more than my system at idle or even low use.

Which PSU do you have?

 

[PMussack]

If you suspect a hardware problem....list all your hardware 😉

Most newer PSUs, of good quality, has a low power mode, basically unless the PSU hits a certain load the fan will not start to spin. If you just power it on without any load, a power on test, it will not spin.

For example, my Corsair AX860is fan will not start spinning until it gets to higher than 20% load so 172w which is well more than my system at idle or even low use.

Which PSU do you have?

I've got the EVGA Supernova 750 B2

 

[Archaic59]

The 750 B2 does not have ECO mode to limit fan use. Something is not connected properly of you have a bad unit.
*note: You can't just plug the PSU into the wall. It has to be installed and connected to the motherboard to work unless you have a tester or do the paper clip test.

 

[Shaun o]

If it`s your first time building a system check that all power from the Psu is connected to the motherboard.

The two key points are the 24 pin main Atx power block on the motherboard.

And a 8 pin Atx 12v power point on the motherboard.
Both need to be connected as. or your system may briefly power on , then shut down after a second or so.

Fail to power up completely.
Or power up with fans spinning, but you get no video signal on your connected monitor to the new system build.

Check the two power points first.
Next look in the motherboard manual, for the memory slots on the motherboard. it will state depending on how many memory sticks you have what memory slots memory should be placed in, and in what order of the provided memory slots should be populated with memory sticks.

Check if using a Pci-e graphics card, that any extra power it requires direct from the PSU are connected to the edge or back of the graphics card.

On the back of the system, check that the rocker switch found on the power supply unit is set in the right state for normal operation and power of the power supply unit.

 

[jimmysmitty]

The 750 B2 does not have ECO mode to limit fan use. Something is not connected properly of you have a bad unit.
*note: You can't just plug the PSU into the wall. It has to be installed and connected to the motherboard to work unless you have a tester or do the paper clip test.

Correct it is just a low noise fan. Even with a power on test it should actually spin up. I think that PSU actually comes with a power on tester in the box as well to test with.