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Capelix can header question


capricorn123290
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In the manual it states to connect the capelix aio to the cpu header. I glossed over this and connected it to the commander core fan header. Works as far as I can tell, I had the cpu header ignored in bios for my open loop water cooler before. Should I change this to the CPU or aio header on the mobo or does it not matter?
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The 'fan connector' on the Elite AIO series (and most others) is not an actual control header. It does report a raw pump speed, but that value is already reported in CUE. You are burning a Commander Core fan port if you need it for something else.

 

The main purpose of connecting it to CPU_FAN is to trigger the BIOS native 'fan error' warning system if the pump were to fail to start or otherwise go electrically dead. You would get the immediate BIOS warning rather than make it the desktop and then heat up to shutdown over the next 60-90 seconds. The sudden massive fan blast might give it away as well, but the user has the ability to prevent that. It's a safety warning more than anything else.

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No. On most boards (and definitely your Asus), AIO_Pump and W_Pump are former chassis fan headers automatically set to 100%. On some more recent or higher end boards, that can be turned off and it becomes a CHA Fan header again. The 100% fixed header is for the old MB header powered pump/fan combination. You rarely see this anymore except on small 120mm units without RGB. Everybody needs/wants the SATA connection to make sure the unit gets power and the user doesn't accidentally shut the pump down on a BIOS flash.

 

You can put on AIO and it has absolutely no consequence to you, other than it won't generate the BIOS warning if it fails. This isn't some great risk you are taking and most people aren't even aware of the function. The system will protect itself by shutting down. If you have the option, you might as plug it in to CPU fan. It's difficult or otherwise undesirable, you simply can not plug it in at all. It does not affect the cooler's operation.

 

Most people run into this unintentionally. They get a AIO cooler powered by SATA. Connect it up and run that 1 wire with the tachometer sensor to AIO or W_Pump. Then they try and boot and get the CPU FAN error immediately since nothing is on CPU fan. The connector is one way of dealing with that by connecting to CPU fan and becoming a safety feature again. The other way is to disable the CPU fan warning. To do that on Asus, go into the Advanced BIOS-> Monitor Tab, then scroll down until you find the CPU Fan speed (0 rpm). Hit enter and change the setting to "ignore". The feature is now turned off.

Edited by c-attack
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