What RPM is usuall for DDC 3.2

[Bladesinger7x]

I installed water cooling last week and I noticed that the pump
(DDC 3.2. with EK v.2 X-Top) changed RPM few days ago from
~4200 RPM to ~4600RPM.

Is this normal RPM for the pump?

...the loop has planty of water so the pump is not running dry.
Also, the pump is new and has never been used before (previously
I had DDC-1 so I can not compare it to the 3.2)

[Factotum]

move (http://www.youtube.com/watch?v=vVBDJPYYZiQ&feature=player_embedded)

[Bladesinger7x]

Thanks for the link.

According to the video the DDC 3.2 should not change RPM depending on restriction,
and I read somewhere here on XS that the average RPM should be around 4400 RPM.

Hopefully nothing is wrong with the pump ...also restriction should not be all that much
with Heatkiller LC, EK VGA-Wave GPU block, Swiftech 320 and 3/8 tubing with Y-fillport.

[Waterlogged]

Sounds like it finished bleeding and passed a decent size bubble.

[Factotum]

Thanks for the link.
thanks @Waterlogged :)

[Bladesinger7x]

Sounds like it finished bleeding and passed a decent size bubble.

Maybe, however, today the pump is back at 4200RPM:shrug:

[Jamesrt2004]

if its constant it's most likely fine

[Bladesinger7x]

It is changing a little ...from ~4250 to ~4270 so this is fine.
I am just wondering why it suddenly jumped to 4600-4700
for a few days and now back to 4200 RPM.

I guess I will need to monitor the pump for few days to see
if this is going to change on a day to day basis ...it may be
connected to the psu 12v output (the psu is 4 years old so
this may be the cause).

[ahmad]

I would guess the 12v line as well. Maybe your load has changed... monitor your 12v at 4200 then at 4600.

[Waterlogged]

It is changing a little ...from ~4250 to ~4270 so this is fine.
I am just wondering why it suddenly jumped to 4600-4700
for a few days and now back to 4200 RPM.

I guess I will need to monitor the pump for few days to see
if this is going to change on a day to day basis ...it may be
connected to the psu 12v output (the psu is 4 years old so
this may be the cause).

AH HA! In the topic that the video was originally meant for, the discussion later revealed that the only thing we could find that would vary DDC RPM was amp output. If I were you, I'd keep a very close eye on the PSU. . .sounds like it's getting ready to let you down.

[Bladesinger7x]

Update: I replaced the old Tagan PSU with Corsair HX750W but the rpm problem remains.

It seems that the pump in not reporting rpm correctly or the pump is on the way to die
...usually the rpm changes on boot (1st boot ~4300, shutdown, 2nd boot 4700) ...and
not when working (when working the rpm changes about 100rpm+-).

Also, is it normal for DDC 3.2 to have a high pitched whirring sound? The pump is isolated
with on rubber feet and the sound remains the same if I pick it up and hold it in my hand.

Could be that I overtightened the top (EK X-Top V2)?

[dejanh]

Update: I replaced the old Tagan PSU with Corsair HX750W but the rpm problem remains.

It seems that the pump in not reporting rpm correctly or the pump is on the way to die
...usually the rpm changes on boot (1st boot ~4300, shutdown, 2nd boot 4700) ...and
not when working (when working the rpm changes about 100rpm+-).

Also, is it normal for DDC 3.2 to have a high pitched whirring sound? The pump is isolated
with on rubber feet and the sound remains the same if I pick it up and hold it in my hand.

Could be that I overtightened the top (EK X-Top V2)?

You sure you are not getting air into the pump somehow? I have three of those pumps and reported RPM is in the range of 4450RPM - 4550RPM on all three. Only time when I heard a sound like what you are describing is when I accidentally starved the pump of water for a split second.

[damha]

whats ur setup exactly?

[Bladesinger7x]

whats ur setup exactly?

Swiftech MCR320->Y-line->DDC 3.2+EK Top->Heatkiller 3.0 LC->EK GPU-Wave->rad

Pump has the inlet on the top (connected to the Y-line which goes to the fillport) and
outlet streight out so no air should be trapped in the chamber.

pics from a different thread:
http://www.shrani.si/f/2/Nn/3cBstR9L/fotografija0322-800x600.jpg

http://www.shrani.si/f/1y/H2/2PZuEbc9/fotografija0321-800x600.jpg