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post #14741 of 19221
Quote:
Originally Posted by xTesla1856 View Post

Anyone know how to polish a scratch out of my Enthoo Luxe sidepanel ?
if it's in the metal youll need something else but plastx works great on the window
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post #14742 of 19221
Thread Starter 
Quote:
Originally Posted by rx7racer View Post

Don't want an open case and too much heat comes off these rads.

I'm running 2 x 240mm rads.
Snip
Also for intake and exhaust it's not about size of area per se, it's all about cfm numbers. I have about 100cfm coming in for airflow through rear intake. Then for exhaust I probably have right about 120 cfm as exhaust. So dealing with negative pressure but better than dumping heat into case even with positive pressure in this small of a space.

This as I said is my experience with it. If you all run an Evolve ITX with 2 x 240mm rads and have them as intake and it works wonders, awesome, would never tell you to change it if your temps are low and right where you want them. For me this cases air flow is too restricted for 2 x 240mm rads and it has really quick heat build up inside during actual use.
First you say intake and exhaust is not about area, then you say case airflow is restricted .. can't have it both ways. If it is not about area, what is restriction? Case having negative pressure is because the intake is more resricted than exhaust. You have a single intake fan and a very small vent with no fan on the back trying to supply the airflow used by 2x 240mm radiators. It doesn't take rocket science to see how much less intake flow is available than exhaust. and the air has to flow into case before it can flow out. The flow through your 2x 240 radiators is only as much as the back intake and vent flow into case.

CFM rating means almost nothing. After all it's the airflow rating in open space with no resistance. It is only relevant if you are using the fans by setting them on an clean bench or hanging them on strings. No idea how you are coming up with the 100cmf and 120cfm figures, but they are obviously wrong. If they were correct, opening the side cover would not lower temps.

If you have 100cfm flowing in you have 100cfm flowing out. A case can only flow the lessor of the intake or exhaust. It makes no difference how much cfm rating your fans have, If 100cfm of air flowing in, you will have 100cfm flowing out. If there is more flowing out the case's negative pressure will continue to increase until it sucks itself into a metal ball. Now you will say don't be ridiculous and this will not happen .. and with computer cases and fans this is true. But the concept is valid. Airflow is fluid dynamics. Think of your case as a water tank, the fans as pumps and the vents as holes in the tank. Pumps put water in and pumps take water out, but the pumps taking water out can only take out as much water as in coming in .. either being pumped in or leaking in through holes. So if there is 1 pump and a few holes putting water into the tank the most that can be pumped out is that one pump's volume and what little the holes are leakng in .. which is obviously much less than 4 pumps can take out if they have all the water they can pump.

I really don't care if you improve your cooling or not. Enjoy your system any way you want. But don't use false logic trying to justify it. The facts are all too obvious .. you do not have enough intake airflow to keep up with the needs of 2x 240 radiators..
post #14743 of 19221
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Edited by rx7racer - 8/21/16 at 8:19am
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post #14744 of 19221
Thread Starter 
Quote:
Originally Posted by rx7racer View Post

Spot on, now you know why I run it the way I do for the temps I need and able to not recirculate all the rads heat.

And I'm getting it by combining an estimated ability of the fans for intake and exhaust. Such as for exhaust I have in theory open 2 fans that could potentially move 110 cfm, both running 100%, so after restrictions they may be wanting to try to do 45-50cfm each at 100% fan speed.

Think about what you know and how I described my setup, apply your own tutorials.

It's not hard to see where I get my numbers from, go read about your fans and what not guides. Stop picking apart something that doesn't need to be.

What I think is funny is I even gave my fan rpm breakdowns and what not in my original post about my 3rd iteration.

Anyway, have a great day and I will enjoy my rig just fine as I always have. thumb.gif

Edit: I can tell you haven't ever done a build in an Evolve ITX case.
To my way of thinking you are running it the way you are because you have too much crammed into a small a space with way too little intake airflow compared to exhaust demands .. so your exhaust flow is severely limited by intake restriction.

You really need t take off your rose tinted glasses and place your feet firlmly back on planet Earth. The cfm numbers you are using only exist in some altered universe .. not in our applications.

A fan with a 110cfm rating will be lucky to flow 40cfm in application .. and that application is not in a small case with 4x fans all competing for an extremely limited amount of airflow. Your single rear intake and small vent that can flow at best maybe 100cfm .. 1/4th of what your 240 radiator fans. This means each of the 4x fans on radiators only have a fraction of the airflow they need. about 25cfm at best .. probably less if you actually measured the fpi of air coming out of them..

I do see how you go your numbers, but the way you are trying to use them is flawed.

My building in an Evolv ITXhas nothing to do with it. Neither would my not using a loop in any of my current systems. What I'm trying to explain to you is not case of cooler being used. I'm only talking about airflow potential / limitations. smile.gif

The proof is in the fact if you open the side cover your temperatures do down. If you had enough airflow into your case this would not happen.
Edited by doyll - 8/20/16 at 10:26pm
post #14745 of 19221
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Edited by rx7racer - 8/21/16 at 8:19am
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post #14746 of 19221
Thread Starter 
My rose glasses are not obstructing my perceptions of reality. biggrin.gif

Your top radiator has 2x fans on it, therefor it is not passive.

The reality appears to be you have no functional option but to have negative pressure. You have no other intake options. What your negative pressure is accomplishing is lowering the airflow through your radiators .. something that in my rose tinted view is negative performance.

I really do understand that you are getting what you think is the best out of what you have .. and while that may be very true it does not change physics and that your intake flow limitation is severely limiting the cooling ability of your radiators.

Honestly, 'possessive' and 'negative' flow is seriously misunderstood. Do you have any idea what the actual pressure differential involved is? Even with your extremely limited intake area I doubt it's enough to even be felt. Normally it's something like the difference between sea level and 3 meters above sea level. In your severely limited intake case it might be more like 6 meters. Any way we look at it, (rose tinted or whatever) it's almost nothing.

Like I said before, I really don't care, except for the false rationalization. I suppose iIf I had enough H2O components to experiment I could get an Evolv ITX and have a play, but it's almost an effort in futility .. simply an extreme case (no pun) of too much in too little. biggrin.gif
Edited by doyll - 8/21/16 at 12:11am
post #14747 of 19221
I'm just surprised his initial temperatures were so bad, when I had my Evol-iTX I had a BlackIce 240GTS in the front as intake, a Swiftech H220-X in the roof as exhaust and a rear 120mm fan as exhaust. I was running an OCed 4690k and an OCed GTX 970 and my max temp was 62C. Low to mid 50C was more common while gaming.
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post #14748 of 19221
Quote:
Originally Posted by rfarmer View Post

I'm just surprised his initial temperatures were so bad, when I had my Evol-iTX I had a BlackIce 240GTS in the front as intake, a Swiftech H220-X in the roof as exhaust and a rear 120mm fan as exhaust. I was running an OCed 4690k and an OCed GTX 970 and my max temp was 62C. Low to mid 50C was more common while gaming.
tim lottery and fan selection placements orientations and speeds...i run all my fans at 100 percent which possibly hurts me in some situations but i have never had an issue with cooling except when truely pushing the limits...most people see a fan and go oh cool 50cfm...then run it half speed and restricted through mesh and radiator (which cfm means not a whole lot) and then blame the fan...
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post #14749 of 19221
Thread Starter 
Quote:
Originally Posted by mfknjadagr8 View Post

tim lottery and fan selection placements orientations and speeds...i run all my fans at 100 percent which possibly hurts me in some situations but i have never had an issue with cooling except when truely pushing the limits...most people see a fan and go oh cool 50cfm...then run it half speed and restricted through mesh and radiator (which cfm means not a whole lot) and then blame the fan...
Or have / use half as many vents for exhaust or intake as they use for intake and wonder why the case is running hot. "I have fans in every vent the case has, 7x intake and 2x exhaust, but the case is a hot as it was when I had only 3x intake fans." Golly Jee Willickers .. no idea where they learned common sense, but 2x 140mm round holes can not flow more than 2x 140mm round holes flow. So having 7x 140mm round holes pushing air at 2x 140mm round holes means only 2x 140mm round holes of air will flow in through those 7x 140mm round holes. Yeah, I know .. cases are not sealed so air leaks out other places too, but it few cases have enough small leaking places all combined to let out as much air as even a 120mm round hole does.
Edited by doyll - 8/21/16 at 8:54am
post #14750 of 19221
Quote:
Originally Posted by doyll View Post

Or have / use half as vents for exhaust or intake as they use for intake and wonder why the case is running hot. "I have fans in every vent the case has, 7x intake and 2x exhaust, but the case is as now now as it was when I had only 3x intake fans." Golly Jee Willickers .. no idea where they learned common sense, but 2x 140mm round holes can not flow more than 2x 140mm round holes flow. So having 7x 140mm round holes pushing air at 2x 140mm round holes means only 2x 140mm round holes of air will flow in through those 7x 140mm round holes. Yeah, I know .. cases are not sealed so air leaks out other places too, but it few cases have enough small leaking places all combined to let out as much air as even a 120mm round hole does.
im hoping my airflow does ok once im done ive got a 480 in the bottom intake, 420 in the top as exhaust two 140s in the front as intake and a 140 on the rear as exhaust...(havent decided on the h220x as exhaust or intake yet as its set in the side beside the mobo) ill also have a 120 pointed at socket and a 120 hitting the vrms both towards the board...all fans on rads are swiftech helix, case fans are all three phanteks 140s and the supplementals are cougar 1200 rpm...all will be running 100 percent...i think it will do pretty good i had the pro case setup nearly the same way and temps were good but i didnt have the side rad...ill try it all out and see
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