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Will running the pump at 100% full time significantly reduce its lifespan?


Black Hole Box

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You are supposed to provide 12v to the pump at all times. Cutting the voltage to the H110 motor and trying to run it like a fan is more likely to shorten the lifespan.

 

Thanks. That's what I was thinking, but the CPU_OPT header that my motherboard manual says is made for water pumps is confusing and doesn't explain whether it's safe to control the pump speed.

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Your hardware specifications are not listed, but CPU and OPT sound like Asus. The OPT header mirrors the level of CPU_FAN. If you set CPU to 50%, OPT runs 50%. Custom curve? OPT will do the same. It is really only useful for controlling two CPU cooling fans or connecting one radiator fan to each header, then run the pump 3 pin connector to a CHA_FAN header or a molex lead back to the PSU. I would prefer the CHA header so I could see the pump speed if needed, but that may not be an option.

 

Did you decide on Z170 or X99? The Z170 does have a Water_Pump header that can be used for the 3 pin pump motor on the H110. For Asus X99, I would recommend the CHA header for the pump and CPU&OPT for the fans, especially if they are PWM.

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Your hardware specifications are not listed, but CPU and OPT sound like Asus. The OPT header mirrors the level of CPU_FAN. If you set CPU to 50%, OPT runs 50%. Custom curve? OPT will do the same. It is really only useful for controlling two CPU cooling fans or connecting one radiator fan to each header, then run the pump 3 pin connector to a CHA_FAN header or a molex lead back to the PSU. I would prefer the CHA header so I could see the pump speed if needed, but that may not be an option.

 

Did you decide on Z170 or X99? The Z170 does have a Water_Pump header that can be used for the 3 pin pump motor on the H110. For Asus X99, I would recommend the CHA header for the pump and CPU&OPT for the fans, especially if they are PWM.

 

I'll thank you here for your detailed reply in the X99/Z170 thread. I saw it had disappeared and assumed it was deleted, but just now saw it was moved and read your post.

 

I went with Z170 since 2011 CPU prices skyrocketed right when I was ready to order. I'm using a Gigabyte GA-Z170X-Gaming 7

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OK, not Asus. Disregard the OPT "mirror" information. The Gigabytes use CPU, OPT, and SYS fan headers. The OPT has a different pinout than the CPU header. Most likely you want the H110 on CPU fan and set to 100%, 12v, full speed, or however the BIOS described maximum. The PWM radiator fans can go on OPT. I am afraid beyond that, you need someone with a Gigabyte Z170 for more specific info.
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