Question Running AIO pump off same header as fans

[tom_taylor97]

Hello

So the title basically explains it all. I was lucky enough to get a 5900X and using an EK-WB 240 AIO to cool it.
I have an itx motherboard with only 2 headers and currently have 1 header for 2 case fans and the other header for the aio pump & aio fans using the noctua splitters.
My question is whether it is okay to run the pump on the same header as the fans? I've run the ryzen master stress test and seem to be maxing out around 72-75 which seems fine temps wise, just unsure of whether it will have a negative effect on the pump.

Thanks!

 

[EridanusSV]

As long as its a 4pin PWM that the software or BIOS can control, then you're fine. And lifetime wise, you'd be upgrading everything before that pump even reaches half of its life.

 

[tom_taylor97]

As long as its a 4pin PWM that the software or BIOS can control, then you're fine. And lifetime wise, you'd be upgrading everything before that pump even reaches half of its life.

Perfect Just wasnt sure if there were any negative side effects of running a pump really slow

THanks!

 

[SkyNetRising]

My question is whether it is okay to run the pump on the same header as the fans?
just unsure of whether it will have a negative effect on the pump.

Don't do that. You can kill the fan header.

 

[tom_taylor97]

Don't do that. You can kill the fan header.

Why will it kill the fan header?

 

[SkyNetRising]

Why will it kill the fan header?

Fan headers are not designed for connecting a lot of devices to it.
2 fans would be fine,
3 fans maybe (if total current is below 1A),
2 fans + AIO pump will most likely fry the fan header.

 

[tom_taylor97]

Fan headers are not designed for connecting a lot of devices to it.
2 fans would be fine,
3 fans maybe (if total current is below 1A),
2 fans + AIO pump will most likely fry the fan header.

Are you sure? Motherboard website states up to 24W per header with over current protection. (Aorus X570 ITX)
The noctua nf-a12x25 are only supposed to draw max of 1.68W per fan

 

[SkyNetRising]

24W would mean 2A limit per fan header.
Can you find any info on power draw for EK-WB 240 AIO pump?
If it uses 2A, then you can't connect any more fans to the header.

 

[Phaaze88]

Those are 2A headers. It's in parentheses on the motherboard webpage.
EK AIO 240 pump input current: 0.65A, give or take 10%... so 0.72A max?
NF-A12x25 input current: 0.14A. 2x: 0.28A
0.72 + 0.28 = 1A

If your board's headers were 1A and not 2A, you would've burnt them out.

 

[SkyNetRising]

It would make more sense to use molex to fan header adapter for the pump (would loose pump speed monitoring though).

 

[tom_taylor97]

It would make more sense to use molex to fan header adapter for the pump (would loose pump speed monitoring though).

Doesnt that seem somewhat pointless though? It involves 2 extra cables (1 psu & the molex adapter) in an itx build & would then lose the ability to control the pump and run at max 24/7.
Surely I am fine using the fan headers as you've just said I'm using half of the available power and at no risk of burning them out

 

[drivinfast247]

So *you're gonna run the pump and fans at 100% all the time?

Edit: typo

 

[USAFRet]

The pump is meant to run at full speed all the time.
The fans are not.

 

[tom_taylor97]

So your gonna run the pump and fans at 100% all the time?

No, I used a fan curve but if I used a molex to fan header for the pump it would be 100% wouldnt it?

 

[tom_taylor97]

The pump is meant to run at full speed all the time.
The fans are not.

I'm not running either at full speed. Are you sure the pump is meant to be full speed? Why add the pwm option if its meant to run at 100% all the time?