No loop flow

Mrnob · 4 Dec 2014 at 10:47

Hello yesterday i added 2 980s to my loop, i've been running a waterloop just for the cpu for around 1 and a half years. But since added the 2 gpus i cant seem to get any flow. I've tried different speed settings and shaking the case around and nothing.

Flying_Hellfish · 4 Dec 2014 at 10:57

How are you measuring it or is it just visual?

Mrnob · 4 Dec 2014 at 11:13

Just from looking at it yea

Flying_Hellfish · 4 Dec 2014 at 11:17

You should see at least a few bubbles moving about in a freshly filled system, so that's worrying

I would say get yourself a flow meter but mine has not worked properly so far! Possibly worth getting a physical flow indicator in there?

If there's a big bubble somewhere then you'll just have to keep bleeding it

Mrnob · 4 Dec 2014 at 11:28

it did moved all around at first went putting the liquid in but it seems to have like a vacuum action

almighty15 · 4 Dec 2014 at 11:38

Squeeze the pipe and for a few seconds and then it go.

When you let it go you should hear a gush of fluid.

The Mad One · 4 Dec 2014 at 12:46

Probably a stupid question but it's hard to make out from your picture as it so small but do you have the 2 cards connected? It looks like you have one pipe connected to each card but no flow out from the card, i.e. the bottom card should have pipe connected to the top card to continue the flow round the loop.

Uncle Petey · 4 Dec 2014 at 12:50

You can see the fittings/tubing connecting the two cards

OP, is there movement in the res? Try tipping the case onto it's front. That should clear any air in the rads.

Mrnob · 4 Dec 2014 at 14:16

I've tried tipping the case in all directions but no success, i've ended up stripping the whole thing down.

Uncle Petey · 4 Dec 2014 at 14:19

What exactly makes you think there isn't any flow?

Mrnob · 4 Dec 2014 at 14:29

Well theres water thats stuck up at the top left corner of the case around the gpu and cpu block area. Then the outlet of the pump which goes to the gpus has barely any liquid inside of it, and there is no movement in the reservoir.

kaku · 4 Dec 2014 at 14:29

Are the inlets/outlets on the GPUs fitted correctly? Not sure if it matters on those blocks, but it's worth checking.

Are temperatures high or the pump making a strange noise to make you think flow is being restricted?

Mrnob · 4 Dec 2014 at 14:32

On the instructions it said that i could use them either way. As im just trying to leak test nothing is heating up and there is no unusual noises.

Uncle Petey · 4 Dec 2014 at 14:43

Definitely sounds like trapped air to me.

When you're filling it, do you close the res or leave it open?

Mrnob · 4 Dec 2014 at 14:45

I've always left it open. I'll be trying again once i buy some more tubing

Uncle Petey · 4 Dec 2014 at 14:53

Might be worth testing the pump in a simple loop if you've stripped it all down.

Mrnob · 4 Dec 2014 at 15:12

Hi, ive just tested my old res i had lying around with the d5 attached with tubing from the inlet to the outlet and it is 100% working

Uncle Petey · 4 Dec 2014 at 15:43

Unless there's some kind of manufacturing defect preventing proper flow in one of the components, trapped air is pretty much the only answer here IMO. It bears all the hallmarks from what you say.

In/out ports on the cpu block tubed up correctly? If they are, I'd personally flip the block as it doesn't look like it's best suited to optimal flow as it is.

Other than that, I'm stumped

Mrnob · 4 Dec 2014 at 16:13

Cheers for all the help guys, yea im guessing it was the trapped air. May have another attempt doing it by the weekend.

Mrnob · 7 Dec 2014 at 17:34

Just had a thought, how am i able to run my pump at full as it its a pwm version without the motherboard. ALso i can't use it on my fan controller.

Well i did have the pwn cable running to another comp, but if theres an easier way then that would be better