Low flow rate in the loop

Winstrol · 23 Oct 2017 at 09:10

Hello, for some reason my loop has really slow flow rate, I'm using dual d5 combo with 1x120mm 1x240mm 1x200mm radiators and cpu,motherboard and graphic card block. Fluid goes really slow even on max speed from both pumps, do you think I should add 1 more pump? Or there might be something wrong in my loop?

https://imgur.com/a/wqbh1

Smffy · 23 Oct 2017 at 10:41

Is the pump defo on max? How are you measuring the flow?

You need to post some pictures with the lights on so people can see the loop order and point out where it flows. Presume you’ve checked for kinks in tube and that you are using the right inlet on the CPU block and didn’t mess with the jet plate.

Winstrol · 23 Oct 2017 at 10:43

They are at 5 speed, and they have from 1 to 5 so its max out. And I have two flow meters with fans inside and they dont even move after couple of minutes.

Blame · 23 Oct 2017 at 11:15

Is this a new loop? specs? temps on load?

You sure the flow meters are moving freely?

You shouldnt have flow problems with dual D5 and only 3 small rads. (run 2x480, 1x240 with single D5)

Only thing i would suspect is a clogged cpu, Gpu block.

Smffy · 23 Oct 2017 at 13:04

Something’s blocked yes, or your loop order is off (directionally). More pics and some pointers on in/out would be good - presume you are using the right out/in on the pump also I think there are several?

Reality|Bites · 24 Oct 2017 at 02:44

If it's a new build you might still have air trapped somewhere.

VKleita · 24 Oct 2017 at 19:14

only time have seen this is usually cheap crap Flow meters.

2x D5 should be creating a ton of flow, unless you havent got fluid into them due to bad res placement etc.

Aneskimo · 24 Oct 2017 at 19:22

Looking at that pic the tubing going to your CPU on the left looks slightly kinked, not too sure as lighting is dark.

tyler_jrb · 24 Oct 2017 at 21:15

2x d5's should push a lot of water through.

You wont necessarily get a great deal more flow rate but you will get twice the head pressure of a single pump.

I would say as above. Something directionally is off. It's blocked. Or your flow meter is not reporting correctly.

1. Run a GPU demanding game or task with 99% usage and pumps at mid speed 1500rpm or so. If you have a severe flow issue you should see 10 degrees or more difference from mid-max speed on the pumps.

2. If you do see a huge difference then set your pumps to a slow speed. Drain and refill watching the water carefully. The moment it starts to bog down then you have your restriction/blockage. Twin pumps the water should carry through at a continuous rate straight through the loop.

I've had my top 480mm rad block up twice before.