Liquid Cooling with 1 fan vs 6 fans

Hardware Hub Cooling
1

I started a project to see how cool I can my cpu using liquid cooling. Right now I have a CM MegaFlow 200mm pushing air into my XSPC RX480 radiator.

I temps I get using single fan are:

  • 13c idle
  • 50c load

Then i got 6 CM MegaFlow 200mm mounted on a board. Wrapped plastic around board to funnel the air into the radiator. Using my hand I can feel more air flowing through the radiator.

The temps I get using 6 fans are:

  • 13c idle
  • 50c load

I'm getting the same temps. I expected the idle to be the same but the load temp should be lower. Maybe I need to use static pressure fans.

Am I missing something here?

2

Fans might be choking each other or something

Otherwise on a radiator you should use high pressure fans, but what's your radiator size?

3

The radiator is 130 x 56.

4

Sure that isn't a 120mm radiator?

5

Yep, typo.

6

Then maybe go for fans like these, the 140mm fans can fit into some 120mm slots, so if you think that'll fit go for that, otherwise they have 120mm versions

I slapped one onto a hyper 212 and it seems to work pretty well cooling my FX 8 core

7

You need to put the fans in series, not in parallel.

8

That video is not funny anymore.

9

It's pretty simple actually. Since you have a funnel I'm guessing is roughly the same size as one fan you are only getting the air for one fan. Simple rule to follow with gasses. Small opening to big opening slower, cooler, and way less air. Big opening to small opening faster, hotter, and more air.
That's was compressed air from a compressor feels cool and why you usually have condensation. It's how your fridge works.
Take the funnel off. Should work better.

1 Like
10

CPU cooling on Intel is limited by the quality of the IHS. What you are seeing is normal there's nothing you can do other than de lid. There isn't enough heat going into that radiator for the number of fans to make a difference.

11

If you're moving air too fast than the time it needs to "sit" to transfer heat it's obvious that you're not going to get better results. You're moving air enough fast with just a single fan, that's obvious duh. Maybe what you need to do now that you got more fans is speed up the pump since the radiator gained a bit of thermal capacity now that you added more fans. But remember that the thermal capacity is 99% limited to the mass of the radiator.

12

So if you can't decrease heat using more fans, what would do the trick? What if I had two radiators instead of one?

13

a few things. All not really worth it. One more surface area. More rads. Two better heat transfers. I.e. Better compound liquid and metals. Expensive metals. Three colder air being pushed thur. You can do that a few different ways. Finally four upgrade to N2 or compressors. Not worth.
My suggestion. Make your room cooler by having fans push out hot air or bring in cool air. And if you want to go nuts. High pressure air flow is colder than low pressure

14

50C on full load is fine. Why bother?