EK D5 PWM curve is way nonlinear?

Discussion in 'Water Cooling' started by VanGoghComplex, Jul 14, 2018.

  1. VanGoghComplex

    VanGoghComplex [H]ard|Gawd

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    Just got my new pump installed.

    100% PWM - 4800rpm.
    90% PWM - 3300rpm.
    60% PWM and below - 800rpm.

    I think I can adjust for this easily with my Aquaero, but the reviews I've read on this pump claim a fairly linear PWM curve. Am I missing something important?
     
  2. cyberguyz

    cyberguyz Gawd

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    I am guessing you want to use the mobo fan header to control the pump.

    The narrow range of that pump looks like it would need some PWM calibration to take in the pump's duty cycle. PWM is such that it needs to be calibrated right to give you that nice linear curve. Some motherboards have a utility tests the fan's duty cycle to align it with the adjustment range. On my Arock x399 board the utility function called "Fan Test" that calibrate's the PWM range of each fan/pump. For the AIO I am currently using I force it to 100% all the time since it doesn't use a nice pump like a D5.
     
  3. VanGoghComplex

    VanGoghComplex [H]ard|Gawd

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    Not quite, I'm using an Aquaero. But that's just as well; it's nothing if not configurable. Thanks for the reply. =)
     
  4. JargonGR

    JargonGR Limp Gawd

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    I have the Dual Revo D5s that are also PWM connected to the pump headers on an Asus Rampage VI Extreme and I get about 1900rps @ 40% so something needs tweaking probably with yours. BTW mine is the latest PWM version from EK and I am mentioning since there was also another version and I specifically mailed them when I ordered mine 7 months ago to make sure I am getting the new ones.