Ek D5 PWM woes

jasonmorris · 1 Dec 2014 at 08:37

Hi,
Bought a EK Water Blocks EK-D5 PWM Pump and it only seems to run at just over 2000 RPM regardless of whether it's running at 40% or 100%. It should go up to 4000 RPM. I've plugged it into the Lamptron CW611 Watercooling Controller. The fans I have plugged into the controller work correctly. Could the pump be faulty or am I doing something daft perhaps?

BattFink · 1 Dec 2014 at 09:12

From the looks of it that Lamptron controller doesn't generate a PWM signal. All the connectors are 3 pin, which looks to be voltage controlled

Try disconnecting the pumps PWM signal cable, it should run at full speed then, if you need to control the speed of the pump you could use the CPU_FAN header on your motherboard

jasonmorris · 1 Dec 2014 at 09:14

It allows you to control the voltage so I'll try that. Thanks for the advice.

DataVampire · 1 Dec 2014 at 09:27

jasonmorris said:
Hi,
Bought a EK Water Blocks EK-D5 PWM Pump and it only seems to run at just over 2000 RPM regardless of whether it's running at 40% or 100%. It should go up to 4000 RPM. I've plugged it into the Lamptron CW611 Watercooling Controller. The fans I have plugged into the controller work correctly. Could the pump be faulty or am I doing something daft perhaps?

Have you tried to connect it to the cpu fan header (4pin)on your motherboard, that is generally a 4 pin PWN header

jasonmorris · 1 Dec 2014 at 09:44

Thanks. That's my final option but would like to control as much as possible using the fc.

OLDPHART · 1 Dec 2014 at 09:45

Connect it to the CPU header.

vsg28 · 1 Dec 2014 at 13:59

Don't control any PWM device by voltage control, you will just hasten its end.

GiraffePencils · 15 Dec 2014 at 14:17

If you're still here
EK's PWM pumps aren't configured correctly and you need a mod to work with a lot of fan controllers

vsg28 · 15 Dec 2014 at 15:07

Nothing like that. It's just a Laing D5 PWM, and works with PWM controllers. It does benefit from a pull up mod to get the larger response curve but control over PWM is fine.

GiraffePencils · 15 Dec 2014 at 15:12

oh alright,
I did it without testing I suppose as I was told it was a 'must'

So it would work with an aquaero with no mod? (New build and that would save me some work)

vsg28 · 15 Dec 2014 at 15:42

Yeah, just will have a shorter range of RPM to control- especially at the lower end. But D5 being so quiet relatively, I don't see the whole point for most people.

jasonmorris · 15 Dec 2014 at 16:23

It works fine off the CPU header. thanks all for the advice.
I'm running the D5, 2 x XSPC RX360 push/pull and 4 case fans in a Caselabs S8. All 16 fans at 600RPM (40%) and the pump on the CPU header at about 1800RPM and you can't hear anything except the odd squeak from the hard drives. Turn it all up to 100% and it's a jet fighter. All fans are Akasa Piranhas and perform well. Only cooling 4790 at the moment but will do the GPU after Xmas. Wanted silence and a uber case.

yaboydom · 15 Dec 2014 at 16:27

i think you solved a problem for me on my other pc i have all the fans connected to a fc or rather did but it wouldnt let the fans go below 1100rpm i then bought a nzxt grid+ and had the same problems....all of my fans are 4 pin PWM with extensions on them to 3 pin.

looks like i cant control the pwm fans with a simple voltage fan controller.