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First DIY Liquid Cooling - Need Plenty of Advice - Page 2

post #11 of 30
Thread Starter 
Quote:
Originally Posted by pc-illiterate View Post

let me be a jerk
stickers? decals? seriously? are we going to rice up our nice new pc?

to put a pic in your post, see the mountains and sun 'pic' above the post box? its right between the 'movie clip' and the 'paperclip'

LMAO, nah, whatever they are they will be a solid color, just for color coordination. Just wondering if it would impact performance. I've seen some modders painting piece of their hardware, but I don't know if I'm that commuted yet.
post #12 of 30
Paint them LIGHTLY otherwise they will hold the heat.
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post #13 of 30
I seen guys on here who painted their entire board.
Not something I'd do myself.
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post #14 of 30
360 top, 240/360 front, 240 bottom, and 120 back are all the rads you can fit in that case if i remember right
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post #15 of 30
About case airflow design.

Heat rises
Maybe not so much inside the case.
Heat will just go where your fans push it, as there is lots of air movement inside a water coole case.
But outside the case, heat will rise.
So if you have both rads pulling in, that air will exhaust throught back/sides/floor and create a warm 'bubble of air around your casr for your rads to suck back in.

So with a rad up front, and in the roof, I would have both rads push air out.
I beleive that case has enought room to mount intake case fans on the floor/sides/back to maintain positive pressure.

Just what I'd do. Your mileage may vary.
Edited by PepeLapiu - 3/30/14 at 10:31am
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post #16 of 30
Quote:
Originally Posted by PepeLapiu View Post

About case airflow design.

Heat rises
Maybe not so much inside the case.
Heat will just go where your fans push it, as there is lots of air movement inside a water coole case.
But outside the case, heat will rise.
So if you have both rads pulling in, that air will exhaust throught back/sides/floor and create a warm 'bubble of air around your casr for your rads to suck back in.

So with a rad up front, and in the roof, I would have both rads push air out.
I beleive that case has enought room to mount intake case fans on the floor/sides/back to maintain positive pressure.

Just what I'd do. Your mileage may vary.

Cant say that i would agree with that one, but i do agree that it does vary per person and preference . But imo that's asking for a lot of dust inside the case. Better to run positive air pressure from what ive found. i run my 360 top rad as an intake and all other fans in my 800d as an intake with the only exhaust as a rear fan. And when in install my 240 in the bottom it will be an intake as well.

but thats my opinion
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post #17 of 30
,
Quote:
Originally Posted by preston.murrell View Post

Cant say that i would agree with that one, but i do agree that it does vary per person and preference . But imo that's asking for a lot of dust inside the case. Better to run positive air pressure from what ive found. i run my 360 top rad as an intake and all other fans in my 800d as an intake with the only exhaust as a rear fan. And when in install my 240 in the bottom it will be an intake as well.

but thats my opinion

Positive pressure is a good thing.
But too much positive pressure will inder your rad performance.
If you only get x amount of air out with your exhaust fan, holes, and cracks, than your rads will only be able to bring in that same x amount of air.
And your rad fan's precious static pressure is wasted on positive pressure overkill, rather than air movement.
Gotta let your rads breath, both ways.
And even if your rads are pushing out, you still can obtain positive pressure.
There is no rule that said the positive pressure has to come from your rads, and not case fans.
Edited by PepeLapiu - 3/30/14 at 11:17am
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post #18 of 30
Thread Starter 
Quote:
Originally Posted by PepeLapiu View Post

,
Positive pressure is a good thing.
But too much positive pressure will inder your rad performance.
If you only get x amount of air out with your exhaust fan, holes, and cracks, than your rads will only be able to bring in that same x amount of air.
And your rad fan's precious static pressure is wasted on positive pressure overkill, rather than air movement.
Gotta let your rads breath, both ways.
And even if your rads are pushing out, you still can obtain positive pressure.
There is no rule that said the positive pressure has to come from your rads, and not case fans.

I definitely see what you're saying with too much positive pressure causing air flow to exhaust in area you don't intend to. As far as that affecting performance, I would think that would heavily depend on the location of your chassis and the ventilation around it. If I put mine on top of my desk, in and open area, then I would think that the ventilation would be adequate to have a little too much positive pressure in this case. Under a desk would probably be a different story though. My concern with having rads as exhaust would be about the other components warming the air up and decreasing the performance of the rads.

Flipping fans around is pretty damn easy though, so this sounds like something that might be worth testing. I can run this after I build and find out what works best for my case. I'm sure the actual results vary from one build to another anyway. Thanks for the input on this guys!
post #19 of 30
Quote:
Originally Posted by Sizz0rHands View Post

I definitely see what you're saying with too much positive pressure causing air flow to exhaust in area you don't intend to.

That's not really what I mean.
Think of your case air flow as a funnel.
It doesn't really matter if the mouth of the funnel is 10 ft wide. If the small exit end at the bottom of the funnel is a pin hole, than that is the bottle neck of the funnel. You can try to pump like hell, but you will only be able to pour in as fast as the small end can handle.

If only 5 cfm of air is being exhausted out of your case, than you can only push in 5 cfm.

In other words, imagine a case with 7 fans:
4 intake fans, and 3 exhaust fans will provide some positive pressure.
But 6 intake fans, and only one exhaust fan will create too much positive pressure, and not enough air flow.
So you want to keep a fair ballance between your intake and exhaust fans.

Case airflow design, is IMHO, the most dismissed, most important aspect of a good cooling loop.
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 #20 of 30
Thread Starter 
Fair enough. I understand that too though. Flow Rate through any orifice is always impacted by pressure differential. If you have to much pressure inside of your case, then your fans will take less air in anyway. What kind of throws me off is that what you're saying is somewhat contradictory. The last quote you listed on the above post states that cold air needs to be entering the rad, but if I'm pushing the air out as an exhaust, wouldn't that be considered warmed air because of the heat from the RAM and Motherboard chipset?

This might be where Michalius got the idea to make his top rad an exhaust. He also made the back mounted fan an intake though, stating that is was to provide fresh, cool air for the top Rad. This does technically break the "Don't recycle air" rule though. Right now my pump is going to be occupying the bottom fan mount, so I don't know if I could install in more as intake unless I move the pump somehow.
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