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post #31 of 78
Quote:
Originally Posted by Wihglah View Post

Compared to some others, they aren't in the same league.

See the graph above.
Or this:
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post #32 of 78
Quote:
Originally Posted by PepeLapiu View Post

Or this:

or this:

biggrin.gif

Must admit - If AP-15s were still available, they'd be on my shopping list. Noctuas will have to do.
Edited by Wihglah - 4/9/14 at 12:30pm
post #33 of 78
Here is what our water cooling gure, Martin of MML, has to say about rad airflow direction:
Quote:
Originally Posted by Martinm210 View Post

The trick with rad sizing is the installation where grill restriction, poor case air flow, and recycling of heat can easily cut performance in half or worse.
Quote:
Originally Posted by Martinm210 View Post

Also are both rads pushing air out of the case?
You don't want to recycle air through rads..thats a goo way to loose most of their efficiency.
Quote:
Originally Posted by Martinm210 View Post

Yeah, don't bother...doesn't work in water cooling unless you planned to run ultra high speed 4000+RPM fans in push/rad/push/rad/pull type setup.

Bottom line, you need fresh cold air entering each radiator. Recycling already warmed air is bad juju..biggrin.gif
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post #34 of 78
Quote:
Originally Posted by PepeLapiu View Post

Yeah, lots of bad info here.
I suggest you go as thick as you can while reserving room for push/pull.
And a ST30 in p/p would most absolutely outperform a UT60 at any fan speed.
Rad thickness and high fpi count is not where it's at.
Too often, a thinner, low fpi rad will outperform a thick one....especially in push/pull.

A rad in p/p at 800 rpm will be slightly more quiet than the same rad in push or pull at 1000 rpm. And they will both probably perform equally..

As for Corsair fans, I'll let someone else do the talking:

Holy cow. This. All you need to know, +rep
post #35 of 78
Thread Starter 
jesus christ there is alot of conflicting information...seriously i read one thing then on the next page of the thread it's the complete opposite.
I'm so confused!

I did watch all those videos and looked at all the comparative threads.

He never tested 2 x radiators in push/pull with a gap between them at martins labs?

Also he didn't test a sandwhich radiator with 2 x 45 mm radiators in the format i said before..

sp120>rad>20mm shroud>sp120>20mm shroud>rad>sp120

Wouldn't it be the same scenario as water loops? Eg. It doesn't matter about loop order if there is enough airflow?????

If that is a "bad sandwich" then surely this setup is the best possible scenario...

sp120>45mm rad >sp120> 50mm space > sp120 > 45mm rad > sp120 (Even if i made the exhaust go out the back by splitting the airflow?

Higher FPI radiators require better static pressure and higher RPM to dissipate heat and lower FPI radiators work well with lower airflow lower rpm fans but benefit more from push/pull?

Someone straighten my head out please!
post #36 of 78
Im too noob to help you, but you wont get any magical temp differances running push or pull or vice versa. My system is build "wrong" but im happy with the temps and what I do, you dont really need more unless your a dedicated OC/temp geek.
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post #37 of 78
The main reason why a rad sandwich is bad idea is because it recycles the air from one rad into the other.
The second rad is dealing.with air that is already warmed up by the first rad.

You will get barely more cooling than if you have only the first rad.
You can improve your sandwich, but as the Martin quote stated, you'll need 4000+ rpm to see a difference.
Koolance
Maybe you could have the one rad inside your case, getting.fresh air, and the other one outside at the back on a Koolance bracket, also getting fresh air to cool it?

The airflow design of your loop is probably the one most important aspect of your loop's performance.
So take your time with it.
And yes, there will be conflicting advise, as in every public forum.

Find the guys with real experience, and PM them. I bet you they will be happy to confirm or deny my claims on here.

Cheers cheers.gif
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post #38 of 78
Quote:
Originally Posted by PachAz View Post

Im too noob to help you, but you wont get any magical temp differances running push or pull or vice versa. My system is build "wrong" but im happy with the temps and what I do, you dont really need more unless your a dedicated OC/temp geek.

Unless you run spag sauce as coolant, I strongly question your statement that your loop is built wrong.
If it's your first loop, it's likely not perfect.

But you still should enjoy building and using it. Be proud man!

This is why I came down so hard on you when you critisized that other guy's rig.
He is likely very proud of his build, as he should be, he built it and he loves his temps.
Maybe he did it on a budget, maybe he doesn't care about fancy fittings.

Maybe he's only he's only 12 years old and that's all he knows, and can afford.

Be proud of your loop.
And I bet you there is room for improvement....there always is.
That's not to say it was built 'wrong'.

Cheers cheers.gif
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post #39 of 78
Once your ambient air is "warmed" going through a radiator, it's effectiveness going through a second radiator is reduced. It doesn't matter if there is a gap or not.

Don't pull air in from one side of your 915r, then out the other side through two radiators. Set both rads to exhaust and suck air on from the top through the air filter.

As for thickness, at very low air flow, a thinner rad might actually outperform a thicker one of the same design. (But Martins test are a little out of date now, most of the tested rads have been updated since he tested them.)

Make sure you pick the right fans if you go push only or pull only with a thicker rad. If you don't or will have to run them fast to get them to work well.

If you get the best static pressure fans, you can run them slow and still get great radiator performance.
post #40 of 78
Quote:
Originally Posted by renzkuken1 View Post


Higher FPI radiators require better static pressure and higher RPM to dissipate heat and lower FPI radiators work well with lower airflow lower rpm fans but benefit more from push/pull?
Almost correct biggrin.gif
All rads will benefit from push/pull
But thicker rads with high FPI benefit more than thin ones.
The fans struggle to push the air through a thick rad with close fpi. So the rad breaths better with fans on both sides....makes sense?
If I had to run only one set of fans (push or pull) I would use a thinner rad like the XT45, or ST30.

I think your rad sandwich would have about the same performance as a single 80mm Monsta in push/pull.
But the Monsta in p/p would be half the price as your rad sandwich.
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