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how to plug fan to fully psu ?

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Topic

FaHaD1993 1 month ago

hello , i will buy EVGA SuperNOVA 650 G1+ with x2 noctua fans Noctua NF-A12x25 /,, and x2 NF-S12A PWM chromax.Black.swap //// NF-A12x25 came with 2 cable https://imgur.com/a/OtDTODf ,,, NF-S12A PWM chromax.Black.swap came with https://imgur.com/a/h1OTXcD ,, my motherboard is asus prime b350m-a , how i plug my 4 fans to psu ?

Comments Sorted by:

legomaster 7 Builds 1 point 1 month ago

The fans plug into the motherboard, not into the PSU

mark5916 1 point 1 month ago

The second image is an extension cable. You can use it if the fixed fan cable isn't enough.

The first picture does show an extension cable (see above) and a Y-split cable, that you can connect two fans on one motherboard header.

This way, your motherboard will set all the connected fans to run at the same speed.

Now the problem is, that board has one CPU header that you will connect the CPU and has only one additional header to connect the two NF-A12x25 fans.

Now the problem is, what you will do with the remaining two NF-S12A fans!

Normally a chassis fan header has an amperage of 1A

If you make the calculation with these 4 fans, you have:

2 x [NF-A12x25] => 0.14A + 0.14A = 0.28A

2 x [NF-S12A] => 0.12A +0.12A = 0.24A

Sum: 0.28A + 0.24A = 0.52A

Theoretically, you can buy a 1 to 4 fan slitter cable and connect all these fans to the one chassis fan header.

So something like the below:

https://www.amazon.com/DZS-Elec-Splitter-Sleeved-Extension/dp/B07FNQC63R/ref=sr_1_14?ie=UTF8&qid=1547921820&sr=8-14&keywords=1+to+4+fan+splitter

OR

You buy a fan hub.

https://www.amazon.com/SilverStone-System-Cables-Black-CPF04/dp/B00VNW556I/ref=sr_1_3?ie=UTF8&qid=1547922013&sr=8-3&keywords=fan+hub

https://www.silverstonetek.com/product.php?pid=526

And as legomaster mentioned above, you connect Case fans to the motherboards available headers, unless the fan has a molex connection, and on that matter you can connect it to the PSU.

However these Noctua fans doesn't have any molex connectors.

FaHaD1993 submitter 1 point 1 month ago

That best answer i looking for that really great , i will pick with hub Thank you

mark5916 1 point 1 month ago

You're welcome :)

FaHaD1993 submitter 1 point 1 month ago

they said this hub : if you connect the hub to sata , just use sata will it just run at max fan speed . and fan header in motherboard you can control single fan . so that fine if i use to sata to run max speed?? , fans is quite

mark5916 1 point 1 month ago

You will be able to adjust the fan speed, but not separately for each fan.

So if one fan runs at 500 rpm, all the connected fans will run at that rpm value.

If you increase the fan speed to 1000 rpm, all fans connected to that hub will run at the same speed. etc. etc. :)

FaHaD1993 submitter 1 point 1 month ago

so now for Noctua NF-A12x25 spec 2000 RPM max and NF-S12A PWM chromax.Black.swap 1200 RPM max and want run 2000 RPM for Noctua NF-A12x25 what will happen for NF-S12A or there damage ?

mark5916 1 point 1 month ago

Well on that matter, as the glossy part of the device controls the rpm speed of all the remaining fans, i would suggest you to connect the slowest fan on that header.

https://imgur.com/a/djDyVv8

Also there is another problem you may face.

Not all motherboard CHA_FAN / SYS_FAN headers are working with true PWM signals, unless the board states otherwise.

On that matter, you may face speed problems with you attached fan on the glossy part of the device.

FaHaD1993 submitter 1 point 1 month ago

Thank you very much mark i will try to motherbord header first if i have any problem will use hub to sata ( psu sata ) Thank you <3