Fan Wiring Question

[mgrinspan]

Hi! Quick question; My motherboard has 2 fan headers (aside from the CPU fan header) and I have 4 fans, is it better to use splitters and connect fans to the motherboard, or to connect them directly to the power supply? Thanks!

 

Motherboard in question: https://www.newegg.com/Product/Product.aspx?Item=N82E16813144197

Fans in question: https://www.amzn.com/B072BWNGYV

[Mira Yurizaki]

Splitters are fine.

[Cereal5]

Splitters work fine, the two fans run at whatever speed you set that fan header to. Straight to the power supply will make them run at 100% all the time, which can get a little noisy but is otherwise fine as well

[mgrinspan]

5 minutes ago, M.Yurizaki said:

Splitters are fine.

 

3 minutes ago, Cereal5 said:

Splitters work fine, the two fans run at whatever speed you set that fan header to. Straight to the power supply will make them run at 100% all the time, which can get a little noisy but is otherwise fine as well

I've read people saying that I should check the voltages of the motherboard headers and the fans to make sure the motherboard can handle it, is that necessary? I can't seem to find this info.

[Mira Yurizaki]

1 minute ago, mgrinspan said:

I've read people saying that I should check the voltages of the motherboard headers and the fans to make sure the motherboard can handle it, is that necessary? I can't seem to find this info.

Voltage doesn't really matter, it's the current. I can't find any hard numbers but I don't imagine two fans drawing so much current that'll it burn something out.

[LogicalDrm]

13 hours ago, mgrinspan said:

 

I've read people saying that I should check the voltages of the motherboard headers and the fans to make sure the motherboard can handle it, is that necessary? I can't seem to find this info.

Not voltages. All headers will deliver 12V unless otherwise stated. Its amps you need to watch out. Header is 1A max (unless otherwise stated, sometimes there are 2A or 3A headers for water coolers). Fans use 0.05-0.5A each. This is said in fans specs. The way counting amps works is that you combine all amps from fans as one for header they are connected to. Usually you can have 2-4 fans per header without issues.

[mgrinspan]

@M.Yurizaki @LoGiCalDrm Ok, thanks guys, this has been very helpful

[Defyant]

I usually stick with 2 max to play it safe, fans under load from dirt and restricted flow can draw more...... i tested this quiet some years back when i noticed some large piggy backed fans i stuck in a modded case wern't spinning up to full speed...  Fans today are a lot more efficient.