EK DDC pump speed

X3T

X3T

X3T

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Joined
12 Sep 2011
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310
I have an EK DDC 3.2 PWM pump, and as watercooling is new to me I have some questions about its behaviour.

Firstly the pump speed is maxed at 50% PWM. Increasing the PWM speed above this has no effect (it's running at 4500 rpm.) Seems odd?

Secondly the pump is really loud at max speed, but silent at around 3400 rpm. Is this fast enough? I don't see much change in temps between the 2 speeds so I guess it's ok.

Finally, I have it plugged into the CPU header on a Gigabyte X99M motherboard, and it seems there is no way to run it at a fixed speed. I only have options for full speed or CPU temp dependant profiles. There is a fan curve editor but it's the buggiest thing ever and impossible to use.
 
I have my EK DDC 3.2 attached to my CPU header on my ASUS Gene mobo. I set the pump to max upto 3200 rpm using the software ASUS provide. I have two EK SE 240 RADS, so 3200 gets me 40 degrees full load with CPU and GPU. The point of PWM is to adapt to the temps at the time based on the curve you set. Using the Asus software, I can select silent mode and have no noise, but higher temps which is great for desktop work, less so gaming.
I recommend the you research the Gigabyte software and try out different configurations of pump and fan speed to reach the point where the nose is suitable, as well as the performance for the use case.
Be mindful that the DDC is a nosier pump then the D5, so the trade off for its compact size is more noise.
 
Yeah I have set my pump to about 3400 rpm using Gigabyte SIV software now. A bit weird that you can't do this in the BIOS.

Temps seem ok while gaming at this rpm.
 
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