Overclock.net banner
Cancel
Create thread New Forums

Best way to get Positive pressure with my case?

Jump to Latest
1 - 20 of 27 Posts
M

maddnotez

· Registered
Joined
·
83 Posts
Discussion starter · #1 ·
I have the Phanteks Enthoo Pro, how do I get slightly positive air pressure with my fan options?

I just got a 4 pack of the 140mm SP LEDs. I put 3 up top for exhuast and 1 on bottom for intake. (Still have stock 200mm front and 140mm rear)I've noticed good gains but I have a good amount of Negative pressure I believe and I've read that its best to have slightly positive pressure.

I could get 2x120mm for the bottom and replace the 200mm in front with 2x140mm to use all the slots but wouldn't that still be negative pressure?

As far as the case options:

3x140mm top, 1x140mm rear, 1x200mm front or 2x140mm front and 1x140mm bottom or 2x120mm bottom.
 
Discussion starter · #3 ·
Quote:
Originally Posted by Smanci View Post

Just add intake more fans. Try and see what works. Positive pressure works for keeping your case clean of dust, negative means no hot spots and slower temperature rise.
Click to expand...
Well there's not much more I can add. I could replace the 200mm front with 2x140mm and I can replace the bottom 140mm with 2x120mm but there are no other spots to add.

I think that's still going to be negative pressure.

I removed my HDD cages and idk if they're worth putting back in to add another fan.
 
#4 ·
With the Phanteks Enthoo Pro case you simply have too much exhaust fans.
Quote:
3 up top for exhuast
Click to expand...
I planing with mine to keep the stock big input fan, add another input 120mm on bottom (cut the PSU cover for it, remove drive bays completely) and then on the rear end put a 120mm output fan on top and on back. All these there will be 750 RPM Noiseblockers and I believe that I will have a positive pressure, because the huge input fan on front add more air that the (one of the output noiseblocker equals with one input one from the bottom) 120mm Noiseblocker at 750rpm can put out.

I did not have it ready yet, but that is what I plan to do.

Now you can either decrease speed or the there output fans on the top, or increase speed of the default input fan to get positive pressure.

PS. I would be adding a longer legs to the case too, just with screws, as it need more unrestricted cold air input from the bottom of the room
wink.gif
 
Save
Reply Quote Rep+ Rep+
#5 ·
Quote:
Originally Posted by Smanci View Post

Just add intake more fans. Try and see what works. Positive pressure works for keeping your case clean of dust, negative means no hot spots and slower temperature rise.
Click to expand...
Hot spots are caused by poor airflow, not if the case is negative or positive airflow. If the case airflow is setup properly there are no hot hot spots. Simple as that.

@maddnotez
Changing the front 200mm fan to 2x 140mm fans will improve airflow. With 2x front and 1 or 2x bottom intakes you will have plenty of airflow. You don't need or want top exhaust over or in front of CPU cooler. They will only draw the heated air up from GPU where it will be drawn into CPU cooler.

Positive and negative pressure is misleading. By nature, airflow is a result of higher pressure air seeking low pressure to equalize the pressure. (Hope that makes sense) A case will only flow as much air as the lessor of the two; intake or exhaust airlfow. Think of it as a pond with inlet and outlet. what water runs in runs out. and what runs out must run in. "Ways to Better Cooling" link in my sig might be of interest. It's a collection of information about airflow, fans, coolers and how to optimize it all.
 
Save
Reply Quote Rep+ Rep+
Discussion starter · #6 ·
Quote:
Originally Posted by doyll View Post

Hot spots are caused by poor airflow, not if the case is negative or positive airflow. If the case airflow is setup properly there are no hot hot spots. Simple as that.

@maddnotez
Changing the front 200mm fan to 2x 140mm fans will improve airflow. With 2x front and 1 or 2x bottom intakes you will have plenty of airflow. You don't need or want top exhaust over or in front of CPU cooler. They will only draw the heated air up from GPU where it will be drawn into CPU cooler.

Positive and negative pressure is misleading. By nature, airflow is a result of higher pressure air seeking low pressure to equalize the pressure. (Hope that makes sense) A case will only flow as much air as the lessor of the two; intake or exhaust airlfow. Think of it as a pond with inlet and outlet. what water runs in runs out. and what runs out must run in. "Ways to Better Cooling" link in my sig might be of interest. It's a collection of information about airflow, fans, coolers and how to optimize it all.
Click to expand...
Not the best picture in the world but you can see the setup. Two of the top three fans are over the CPU cooler.

Are you saying I should remove them? I could do that and put them in the front if that would help and I can test that but I am seeing 5 degree temp differences since putting those 3 fans in and the bottom fan.

http://s990.photobucket.com/user/ma...otez/media/Mobile Uploads/2015-06/7EA37AD9-5E47-4C58-930E-861E0206C6F7.jpg.html
 
#7 ·
Quote:
Originally Posted by doyll View Post

@maddnotez
Changing the front 200mm fan to 2x 140mm fans will improve airflow. With 2x front and 1 or 2x bottom intakes you will have plenty of airflow. You don't need or want top exhaust over or in front of CPU cooler. They will only draw the heated air up from GPU where it will be drawn into CPU cooler.
Click to expand...
I have a Xion Xon 560 white ed. It has spots for 3 120mm (front, rear, and top) and 1 80mm under the HDD cage. My plan was to use the rear and top as exhaust and the front 120mm and the 80mm as intake, so from what was said having the top fan as a exhaust would be bad since it is pretty much over the heatsink?
 
Discussion starter · #8 ·
Quote:
Originally Posted by Niteowl71 View Post

I have a Xion Xon 560 white ed. It has spots for 3 120mm (front, rear, and top) and 1 80mm under the HDD cage. My plan was to use the rear and top as exhaust and the front 120mm and the 80mm as intake, so from what was said having the top fan as a exhaust would be bad since it is pretty much over the heatsink?
Click to expand...
Curious about this as well. Need to do some reading tonight and see if I can find anything about it.
 
#9 ·
@maddnotez
Airflow is a fickle witch and often does things that at first do not seem logical. Try moving the middle and back top fans to the front. If you have room for 3x intakes in front use all 3 in front. If not, try the front top vent as an intake and see what gives the best temps. I know a lot about air and how it flows and getting it to do what we want it to do. But there are so many variables involve it usually takes some trial and error testing to get the best combinations It's like tuning a race car, the closer we get to peak tuning the more it takes to a combination to give us more.

@Niteowl71
I'm kinda short of time right now. Will answer your questions later or in the morning.
 
  • Rep+
Reactions: maddnotez
Save
Reply Quote Rep+ Rep+
#10 ·
Mad, those 2 top fans also steal cold intake air from the cpu cooler without cooling anything. Either remove them or put them as intakes. The 3rd in the row closest to the back of the case is perfectly fine.

Got beaten to it by Doyll
smile.gif
 
#12 ·
That case is set up for vertical air flow instead of horizontal air flow. That means that the CPU cooler is sitting in a bath of hot air coming from the GPU. It will run cooler if the hot air from the GPU is kept low and back away from the CPU.
 
Save
Reply Quote Rep+ Rep+
#13 ·
Try the top two as intakes, front as exhaust? Hot air rises, and you probably don't have dust filters on the top, but it's something to try. I know that was what I did with an old case, though I also laid the case on its side.
 
#14 ·
Quote:
Originally Posted by Niteowl71 View Post

I have a Xion Xon 560 white ed. It has spots for 3 120mm (front, rear, and top) and 1 80mm under the HDD cage. My plan was to use the rear and top as exhaust and the front 120mm and the 80mm as intake, so from what was said having the top fan as a exhaust would be bad since it is pretty much over the heatsink?
Click to expand...
I have never worked with your case.
Your TRUE Spirit 120 and GPU coolers should do a good job and be reasonably quiet. We just need to supply them with cool air and remove their heated exhaust. I'm guessing that 2x 120mm filtered intakes would struggle to keep up at quiet noise levels .. 3x intakes would be much better. But where to put them is the challenge.
While there is a 120mm back fan, the vent is only 100mm in diameter. Rather restrictive for a 120mm diameter fan.
wink.gif

What is front fan vent like? I'm having a hard time finding good pics of the vents.
I noticed both sides are vented for 4x 80mm fans.

Are you willing to mod / cut the case to improve airflow? If you are, we could possible add a bottom intake and raise case for good airflow to bottom. If you do not need an optical drive, the 3x 5.25 front bays could be converted to an intake. This would give you 2x front and 1x bottom intakes .. and with good fans should do a good job. The stock side venting combined with back may be enough exhaust. Maybe mod the back by removing PCIe slot covers, enlarging the vent and adding a vent above the PCIe slots.
 
Save
Reply Quote Rep+ Rep+
#15 ·
Quote:
Originally Posted by doyll View Post

I have never worked with your case.
Your TRUE Spirit 120 and GPU coolers should do a good job and be reasonably quiet. We just need to supply them with cool air and remove their heated exhaust. I'm guessing that 2x 120mm filtered intakes would struggle to keep up at quiet noise levels .. 3x intakes would be much better. But where to put them is the challenge.
While there is a 120mm back fan, the vent is only 100mm in diameter. Rather restrictive for a 120mm diameter fan.
wink.gif

What is front fan vent like? I'm having a hard time finding good pics of the vents.
I noticed both sides are vented for 4x 80mm fans.

Are you willing to mod / cut the case to improve airflow? If you are, we could possible add a bottom intake and raise case for good airflow to bottom. If you do not need an optical drive, the 3x 5.25 front bays could be converted to an intake. This would give you 2x front and 1x bottom intakes .. and with good fans should do a good job. The stock side venting combined with back may be enough exhaust. Maybe mod the back by removing PCIe slot covers, enlarging the vent and adding a vent above the PCIe slots.
Click to expand...
I have no issues with adding a intake just where would be the question. As for adding a bottom 120mm intake space is kinda limited as you can see in pick there's not much room between the psu and hdd cage.



As for the two side panels the panel behind the mono is vented but to shallow for fans and the other was modified to add a window.



And as you can see in this pic there isn't much room at the top to add a second 120mm (drawbacks of a micro case).



As for the front this is what it looks like from inside case



Half is covered by the hdd cage and unfortunately the cage can't be removed just the 2 plastic brackets that hold the hdds which one will be removed so I can place a 80mm intake fan which the case has a vent for. As for my bay drives I really only need my Op. Drive for installation of windows so I could remove it, but with the mobo I'm getting I'll be getting a fan controller to run my system fans off since the mobo only has 1 fan connection. Now what if when I have my fan controller set up I had the front 120mm and the 80mm set to run full speed and the rear and top exhaust set like half speed would that help with cooling? The PCI-e slots are vented but due to gpu two of the three will be used...
 
#18 ·
Darn, this look like a tough one to get sorted.
GPU has 2x 90mm fans for about 65cfm and TRUE Spirit 120 is about 60cfm so we need about 125cfm through the case. That is at least 2x 120mm fans with little to no resistance.
How much is noise an issue?

I don't know how much you are planning to spend on fan controller, but Aquaero 5 or 6 LT USB don't use a 5.25 bay. Control is from keyboard / mouse and viewed on monitor. These are very sophisticated bits of kit with features and automatic control ability than boggles the mind, but they are not cheap. aquaero 5 LT USB fan controller is 59,90 EUR including 19% tax. And you would probably want a few extras to monitor temperatures, etc.

Most HDD cages can be removed by drilling out the pop-rivets usually used to assemble cases. I can't find a review or much of anything on your case to see what might be possilbe.
 
Save
Reply Quote Rep+ Rep+
#19 ·
Quote:
Originally Posted by doyll View Post

Darn, this look like a tough one to get sorted.
GPU has 2x 90mm fans for about 65cfm and TRUE Spirit 120 is about 60cfm so we need about 125cfm through the case. That is at least 2x 120mm fans with little to no resistance.
How much is noise an issue?

I don't know how much you are planning to spend on fan controller, but Aquaero 5 or 6 LT USB don't use a 5.25 bay. Control is from keyboard / mouse and viewed on monitor. These are very sophisticated bits of kit with features and automatic control ability than boggles the mind, but they are not cheap. aquaero 5 LT USB fan controller is 59,90 EUR including 19% tax. And you would probably want a few extras to monitor temperatures, etc.

Most HDD cages can be removed by drilling out the pop-rivets usually used to assemble cases. I can't find a review or much of anything on your case to see what might be possilbe.
Click to expand...
Well I'm replacing the TRUE Spirit with a Enermax Cluster Advance APS 120mm which will allow me to have a air flow of 26.51 cfm up to 86.69 cfm. As for fan controller I was looking at getting the NZXT SEN-MIX2 Sentry Mix 2 but can take a look at the Aquaero 5 or 6 LT USB. The case fans I have are 3 Phanteks PH-F120SP_WLED 120mm and 1 Vantec Stealth SF8025L 80mm so not sure how the noise level would be. I don't suspect this to be a silent build so noise won't be a issue just don't want it to would like a jet engine where it can be heard from the other rooms or through my headphones. If I did remmove the hdd cage then I would have to place my hdd in a 5.25 bay bracket so I'd be back to having to use a 5.25 bay which wouldn't be a issue if it allowed the from better intake. If I didn't already spend close to $100 on the case window, decals, etc. I'd buy a mid tower which I should have done but wanted to go small and for $29.00 and the good reviews the case got I jumped on it lol! There is a couple of YouTube videos on the case and for about a week now if you try to go to Xion websites it says it don't exist so not sure what's up with that they go out of business????

Edit: took a look at the Aquaero 5 & 6 XL & yea a little out of price range at close to $200 pc performance sells the LT for $71.00 but from images it looks like it uses a drive bay but have seen pics of people placing them on backside of mobo tray so I might could do that?

 
#20 ·
What does the front of that case look like and how many optical drive bays does it have?
 
Save
Reply Quote Rep+ Rep+
1 - 20 of 27 Posts
About this Discussion
26 Replies
9 Participants
Last post:
miklkit
Overclock.net
posts
28M
members
562K
Since
2004
The premier forum for overclocking experts and enthusiasts. Discuss hardware optimization, custom builds, benchmarking, cooling solutions, and pushing the boundaries of computing performance. From beginner guides to extreme overclocking, join our technical community to master system tuning.
Full Forum Listing
Explore Our Forums
Intel CPUs Hardware News NVIDIA PC Gaming Water Cooling