D5 Pump Restriction/ Whine

[coalminer071]

You guys might have more experience with this pump then I do.
At first it was fine. Running it on the 5th dial and having Koolance CTR-SPD12X2 Dual 12V pump controller set at 7 volts for about two weeks now.
However as you can faintly see in the clip, the flowmeter is barely spinning, and as i ramp up the V on the controller, theres a huge whine sound. Is my pump fine and flow meter is just restricting? or vice versa.
In the loop.
Tubes: primochill 3/8ID 1/2OD hardline tubing
Fittings: Primochill Rigid Ghost Fittings
Ek: EK D5 X-Top Pump Top w/ D5 Vario Pump
CPU block: XSPC Raystorm Intel
Radiator: Alphacool UT60 480mm
BItspower: Visual Flow meter
Res: 250m Dual Helix

Here a clip of it

[YouWhat]

To me that sounds like the bearings are shot, I could be wrong as I not done much with watercooling, but it does really sound like the impellar inside there is going out of alignment which usually points to bearings gone or going.

[coalminer071]

this pump is two weeks old

[| raVen |]

Do you still have a warranty for that pump? For me it sounds like the impaler is out of balance, so this is what causing the noise. But I'm not sure.

[Bartacus]

Have you tested it stand-alone, not on that controller?

[| raVen |]

Yeah that would be a good thing to do.
Anyway you can adjust speed of D5 without controller so I don't see a point to run it on the controller.

[coalminer071]

plugging it directly into into psu molex which also controls a xonarstx and and it grinds/whines still.

[| raVen |]

Originally Posted by coalminer071

plugging it directly into into psu molex which also controls a xonarstx and and it grinds/whines still.

Than return it if you have warranty.

[coalminer071]

Originally Posted by | raVen |

Yeah that would be a good thing to do.
Anyway you can adjust speed of D5 without controller so I don't see a point to run it on the controller.

The dial is pretty much right against my Radiator in the front.
Picture during build
https://scontent-b-sea.xx.fbcdn.net/...4a&oe=550EDD65
you can faintly see one of the pump is in the front close to the front rad/fan mounts.

[Bartacus]

Originally Posted by | raVen |

Than return it if you have warranty.

I'd have to agree with this, and I'd never put a pump on that controller again just out of sheer paranoia. D5's are VERY hard to kill, and I'd be hesitant to do control it via voltage. Heck, I came across a guy on another forum who had actually SUBMERGED his D5 in a bucket, because he saw a Mountain Mods video about flushing rads that featured a submersible pump. He assumed the D5 was submersible, killed it, and then just let it dry out for a few days and it fired right back up. Those D5s are tough SOBs.