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Two radiators one case. Need help with fan directions. - Page 2

post #11 of 15
I have couple builds like #1 but both have front fan as exhaust
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post #12 of 15
Quote:
Originally Posted by mm67 View Post

I have couple builds like #1 but both have front fan as exhaust
Quote:
Originally Posted by Jakusonfire View Post

No 1.

This is just some simple preliminary testing, but everyone loves a graph.

Your graphs only show water temp, and there is only a half C difference.

What about board/VRM temps?

I'm not doubting your results in the slightest, but I am seriously doubting your conclusion that 1 is the superior setup (or that any of the specifically listed options in the op is the best at all).
Quote:
Originally Posted by mm67 View Post

I have couple builds like #1 but both have front fan as exhaust

Front fan as exhaust, or left off, may be worth testing with both top and bottom radiators as intake.

The only thing receiving appreciable direct air flow from the front fan would be HDDs in this setup, and HDDs don't often need cooling.
Edited by Blameless - 10/25/13 at 1:44pm
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post #13 of 15
Thread Starter 
Quote:
Originally Posted by Blameless View Post


Your graphs only show water temp, and there is only a half C difference.


The way I read those graphs is (lower set of graphs)

The water flowing into the radiator and the water flowing out of the radiator have temp difference showing how much heat the radiator is effectively moving out of the water.

So for the top radiator being exhaust and front radiator being intake. The water tempurature difference inlet to outlet is 0.45deg C where the top radiator temperature difference of water inlet to outlet is 0.15 deg C, showing that the radiator set as exhaust is barely able to move heat away from the water due to the air it is using being prewarmed by the front radiator.

This is supported with the first set of graphs posted.

Where as if both radiator are intaking air from outside the case the amount heat moved away from the water is almost 0.5deg C each meaning cooler temps for the components being liquid cooled. This is amounting to almost a 2 deg C delta difference between the two different setups.

also supported with the first set of graphs.

At least this is how I read it. cheers.gif

Hope that helps the understanding of why the differences appear so small.


But i would also like to know what the VRM temps look like also for these test. Just out of curiosity.
post #14 of 15
Tha
Quote:
Originally Posted by alanQtrmaine View Post

Now this I find very interesting. which radiator is last in the water loop?

I wonder how preliminary heat load plays its role here.

Say if the front rad is first to cool components down and the top rad is just before it dumps back into the resevoir then the front rad with intake and top rad as exhaust may have the top rad doing less work,

were say if you had the front rad as the last in the loop pulling air in and the top rad getting the first heat from the components and exhausting the the air from the case. Then the front rad may be dissipating a slight load yet buffering the temps to a nice cooler delta for your components.

Maybe i'm over thinking this stuff. though.

edited for spelling.

That would be true if water temps changed significantly along the length of a full loop. If a rad could drop water temp by a few whole degrees then loop order could play a large role but in practice it just doesn't work like that. The whole water loop increases in temp and changes between components are slight if water flow is adequate.
That particular Loop goes Pump, water 1 sensor, CPU, water 2 sensor, Top 360 Rad, Water 3 Sensor, GPU, Water 4 Sensor, Front 240 rad, flow sensor, reservoir.

Quote:
Originally Posted by Blameless View Post


Your graphs only show water temp, and there is only a half C difference.

What about board/VRM temps?

I'm not doubting your results in the slightest, but I am seriously doubting your conclusion that 1 is the superior setup (or that any of the specifically listed options in the op is the best at all).
Front fan as exhaust, or left off, may be worth testing with both top and bottom radiators as intake.

The only thing receiving appreciable direct air flow from the front fan would be HDDs in this setup, and HDDs don't often need cooling.


As far as board and VRM temps go there is really little difference. The air coming out of a rad is only as warm as the water inside it so internal case parts are only getting slightly warmed air. That makes little difference to them but a much more significant difference to radiators. In either setup the internal case is getting warm air from the rads.
As I said this was only simple and prelim testing and I don't want to hijack the thread. The OP only asked which of his proposed setups would be best considering most components are water cooled.

This thread talks about it in more detail.

http://www.overclockers.com/forums/showpost.php?p=7111920&postcount=5
Edited by Jakusonfire - 10/25/13 at 9:00pm
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post #15 of 15
Thread Starter 
So here is my final product.

I have all the fans for the radiators as intake and the front and rear fans as exhaust.

Results have been good so far. VRM's are almost hot to the touch while benchmarking using 3dMar11.

Tonight I'm going to set up a spot fan over the Northbridge/VRM and make an attempt at 5.0 ghz biggrin.gif

Also I just bought a full window side door. I'll report back temps with that attatched after I get my psu far enough back to vent properly.






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