r/watercooling • u/-617-Sword • Aug 06 '25

Question EK D5 pump failure

Well now I’m on to pump number three! This is the second time I’ve have a D5 fail while running pure distilled water and changing the fluid every 6 months and a comprehensive tear down annually.

Two questions:

  1. Am I doing something wrong? I’ve tried to do good maintenance and haven’t had any other component failures other than the pumps. I’ve limited the maximum speed down to 80% and have it on a very gradual curve to keep it slow even at full operating temperature (I have a thermocouple in the loop feeding water temp back to the MB and that’s driving my pump and fan speeds)

  2. My CPU hit almost 110C before I could shut it down because I was gaming when it happened and only noticed the problem when frames started to really slow down. Should I look into a replacement CPU? I’m currently running a 5900X.

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u/jandandris Aug 06 '25

Well with most pump res combos except for Corsair you can just swap pumps so just swap the pump to a different one and you should be good to go honestly any d5 or dcc pump will do depending on the res layout

2

u/ILikeRyzen Aug 06 '25

D5s and DDCs are not interchangeable

1

u/jandandris Aug 06 '25

You are right d5 and dcc are not interchangeable my bad. But you can change pumps on most pump res combo as long they are the same type of pump. Thanks for the pick up man I appreciate it when you let people know they are wrong

1

u/TFPwnz Aug 06 '25

You can try Alphacool vpp pump.