Gidday team,

I have inherited a watercooled rig from my late father-in-law and the Bykski “B-PMD3-COV” DDC pump on the 7000D distro plate is very rattly at 20% / 1800 RPM (as low as PWM will let it go via Gigabyte X570 BIOs).

I want to replace it with the EKWB EK-Loop DDC 4.2 PWM Motor as this is the only option I have available locally.

I hope that I’ll be able to tune down the EKWB pump to below 1800 RPM so it’ll be quieter / less rattly. The rig is used mostly for quiet office work and occasional gaming.

Can you please let me know your thoughts on:

  • Is this a realistic hope?
  • Is this a straightforward task?
  • Is there more I need to consider?

Thank you for your time.

  • @Resolve7English
    2•1 year ago

    To me, it doesn’t look realistic.

    The problem is the distribution plate. The plate is made to accept only Bykski pumps, and the interface between the pump and plate is by o-rings. If you tried to use the EK pump, you would have no way of connecting it to the distro plate.

    If you think the pump is the problem you can try replacing it with the same model. That would be relatively straight forward. You would have to drain the loop, swap the pump, reconnect the power and pwm cables, and refill the loop. There’s guides online for draining and filling loops. That’s likely your best bet.

    • @RomeownsOPEnglish
      2•1 year ago

      Thank you for your feedback. I’ve read that the Bykski DDC pump is a “clone” of the Xylem / Laing DDC pump - so I was hopeful that the EKWB / Xylem / Liang DDC pump would mate to the Bykski disto plate.

      I’m still very eager to hear from anyone who has replaced a Bykski DDC with a EKWB / Xylem / Liang DDC pump.

      In the meantime I’ll follow your advice (partially). I’ll drain the loop and try disassembling the pump and cleaning it internally, as my father-in-law used to run the EK Solid / Matte CryoFuel coolant which may have gummed up the impeller and thrown off the balance.

  • @RomeownsOPEnglish
    1•1 year ago

    OK, I’ve opened my Bykski DDC pump fitted to my 7000D disto place and it’s identical to the Barrow DDC pump fitted to the LTPRP-04 - both circuit boards are labelled as “Q2C-12B”.

    Also, this video shows the factory “Q2C-12B” pump in the Barrow LTPRKA-04, and others on Reddit etc have reported success in swapping this out for an EK DDC.

    Given this, I’ll go ahead and buy the EK DDC 4.2 PWM pump to replace my Bykski “B-PMD3-COV” and report back my findings next week.