Using PUMP headers for case fans?

[Alex0915]

I was reading about the two PUMP connectors on my board (AIO and W) and that I can use these for my case fans too? Does this mean I can connect two additional case fans and I can control the speed of the fans independently of other fans when connected to these? I also read that they handled a higher power, about 3A, unlike the 1A of the regular fan headers? But with each of these PUMP headers, if I do attach fans to them I can't control the fan speeds using software, but I can in BIOS and they aren't a slave to any headers? Thinking about connecting some Cooler Master JetFlo 120 0.4 A case fans to these. They're really loud and need to be regulated down to 40% or so, so not sure they'd make the best heatsink fans though.

[Alex0915]

Thanks I take it this is true of the other pump header too (the W)

I notice you also have a x470class motherboard. I take it if I want to use extra fans I can always connect them through the power supply but their speed cant be controlled either?

I found this but I dont know if it applies to our X470 motherboards

https://linustechtips.com/main/topic/756106-can-i-plug-in-a-system-fan-into-a-pump-header/

http://www.tomshardware.com/answers/id-3617012/case-fan-connect-aio-connector-mobo.html

this one explains it more clearly

http://www.tomshardware.com/answers/id-3694810/connected-case-fan-aio-pump-running-full-rpm-lower.ht...

https://rog.asus.com/forum/showthread.php?96729-Case-fan-in-AIO-pump-fan-header-spinning-at-full-spe...
Z270Hhttps://rog.asus.com/forum/showthread.php?96729-Case-fan-in-AIO-pump-fan-header-spinning-at-full-speed-ASUS-Z270H

https://www.reddit.com/r/pcmasterrace/comments/5y90w0/asus_z270f_use_fan_on_aio_pump_header/


but in the manual it says only the cpu header and 3 chassis fan headers can be controled?

https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/ROG_STRIX-X470-F-GAMING/E14093_ROG_STRIX_X470-F_GAMI...


section 3.2.3 page 3-7

and on page 1-15 it says the W pump header is slaved to the AIO pump header just like the CPU_OPT header is slaved to the CPU header.

[Spuddywuddy]

I have the same question actually. I just bought 4 140mm fans. 2 of them i was forced to connect to the pump connectors. Those 2 fans run at full speed (3000rpm!!) and i can't seem to turn them down in the bios. Sounds like a jet engine. They are 4pin pwm fans btw

[Spuddywuddy]

I figured it out. You have to go to the monitor tab. When you scroll down there is an option to set the pump connector to pwm or dc. that fixed it instantly

[Alex0915]

Thanks so much, so that means they now function just like a fan plugged into any other fan header? Also, I had a question about the two pump headers- is the W header a slave to the AIO header? In other words, is the fan curve for the two always the same? From the chart in the manual it seems so, like it is with the CPU_OPT header in relation to the CPU FAN header.

[Spuddywuddy]

The pump fans don't even show up in qfan control https://i.imgur.com/diSzNSn.jpg
They run at about 400 rpm but they do ramp up when the cpu is under load.
This image is during a prime 95 test. Chassis 4 and 5 are the pump fans https://i.gyazo.com/3b7fbbe66e55887c921788a48139180f.png

[Alex0915]

Thanks that sounds like both fans are tied to the CPU temp and both are linked to run at the same speeds? Someone else said that you have three options, a min temp, a middle temp and a max temp and the fan will run at minimum speed below the minimum temp, and the maximum speed above the maximum temp, has that been your experience too (basically, it becomes a two speed fan.)

Thanks for the screen shots, based on that it looks like the case fans on the PUMP headers run a little slower than the case fans on the CHA headers but that the ones on the CHA headers are more manually controllable while the PUMP header case fans just have a high/low speed? And a higher range (especially higher range than the CPU FAN) and you can set the maximum speed of the PUMP header case fans as lower than the maximum potential speed of the case fans (so even at max CPU temp the fans are never that loud.)