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Water Pump Power

Hi, i have a corsair h55 liquid cpu cooler and an asus z170 pro gaming motherboard. I was wondering where on the motherboard is it safe to plug the 3 pin pump power connector, should i plug it in the cpu_fan or in the cpu_opt?

thanks in advance!
13 answers Last reply Best Answer
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  1. Best answer
    Plug the pump power into a chassis fan header. Plug the fan on the radiator to the cpu fan header.
  2. Suztera said:
    Plug the pump power into a chassis fan header. Plug the fan on the radiator to the cpu fan header.


    thank you for the response, may i ask why this is the case? (just for future reference)

    also, would i be able to plug another fan into the cpu_opt socket?
  3. Whiteskyhd said:
    Suztera said:
    Plug the pump power into a chassis fan header. Plug the fan on the radiator to the cpu fan header.


    thank you for the response, may i ask why this is the case? (just for future reference)


    You want the pump to always receive a constant voltage. Since the cpu fan header is based on the cpu temperature and will fluctuate, it's not ideal to use the cpu fan header to power the water pump.
    Yes you can put another fan on the cpu_opt socket, it will match the same profile with the cpu fan header.
  4. thanks, one last thing, can i put any fan on the cpu_opt header? For example would an intake fan benefit more?
  5. Whiteskyhd said:

    thanks, one last thing, can i put any fan on the cpu_opt header? For example would an intake fan benefit more?


    It would make more sense for a 4 pin PWM fan so the speed can be controlled.
  6. thanks for the advise, i don't actually have a 4 pin fan for my build at the moment
  7. Whiteskyhd said:

    thanks for the advise, i don't actually have a 4 pin fan for my build at the moment


    The fan on the radiator is one.
  8. Suztera said:
    Whiteskyhd said:

    thanks for the advise, i don't actually have a 4 pin fan for my build at the moment


    The fan on the radiator is one.


    the fan i got with my radiator is a 3 pin one
  9. Whiteskyhd said:
    [
    the fan i got with my radiator is a 3 pin one


    Yes, you probably got the H55 with the 3 pin fan version. Only the H55 quiet version has the 4 pin.
    Either way, it shouldn't matter as it's recommended to plug the fan into the cpu fan header.
  10. Suztera said:
    Whiteskyhd said:
    [
    the fan i got with my radiator is a 3 pin one


    Yes, you probably got the H55 with the 3 pin fan version. Only the H55 quiet version has the 4 pin.
    Either way, it shouldn't matter as it's recommended to plug the fan into the cpu fan header.


    with me having only 3 pin connectors would it be better if i plugged one into the power supply via molex?
  11. Whiteskyhd said:
    Suztera said:
    Whiteskyhd said:
    [
    the fan i got with my radiator is a 3 pin one


    Yes, you probably got the H55 with the 3 pin fan version. Only the H55 quiet version has the 4 pin.
    Either way, it shouldn't matter as it's recommended to plug the fan into the cpu fan header.


    with me having only 3 pin connectors would it be better if i plugged one into the power supply via molex?

    Shouldn't make a difference.
  12. Suztera said:
    Whiteskyhd said:
    Suztera said:
    Whiteskyhd said:
    [
    the fan i got with my radiator is a 3 pin one


    Yes, you probably got the H55 with the 3 pin fan version. Only the H55 quiet version has the 4 pin.
    Either way, it shouldn't matter as it's recommended to plug the fan into the cpu fan header.


    with me having only 3 pin connectors would it be better if i plugged one into the power supply via molex?

    Shouldn't make a difference.


    so with 3 pin fans i can't control the speed?
  13. Whiteskyhd said:

    so with 3 pin fans i can't control the speed?


    Some motherboards can via DC. I believe most of asus motherboard offer some form of speed control on PWM and DC.
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