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C70 Case Fan Placement

post #1 of 12
Thread Starter 
First off, I'd like to apologise for not having a picture of my own to aid with my explanation of what I am looking for.

Basically, I am looking to buy 4 new fans for my Corsair C70 Vengeance case. These will replace the 3 stock fans that came with the case, plus an additional one.
My query is; where are the best place to put the fans, and what way should the face (intake/exhaust)?

I have an idea, that I will put:
1 x SP120 Corsair fan for CPU Exhaust (at the back of the case)
1 x SP120 Corsair fan for Case Cooling Intake (located at the bottom of the case, by the PSU)
2 x AF120 Corsair fans for Case Cooling Exhaust (located at the front of the case under the Optical Bays)

I will, in the relatively near future, be getting water cooling for my CPU (most likely a Corsair H100i/110). And I will have the radiator for that at the top of the case, above the CPU. This would be set up as an exhaust also. At which point I would maybe switch the two AF120s around and have them as Intake.

I have no previous experience setting up fans, and have no idea what would be best to ensure the circulation of air within the case. Any advice/help would be greatly appreciated.
post #2 of 12
Too muc exhaust and not enough intake.

I post this basic but by no means complete tutorial often. It's a work in progress:
Warning: Spoiler! (Click to show)
There is much more to cooling than good cases and good CPU / GPU coolers. Modern GPU's make more heat than CPU... and getting that heat out of the case can be a challenge.

Setting up the case to cool properly is the hardest and most time consuming part of a build... And the most neglected by most builders.

We need at least as much volume of air flowing through the case as the total of CPU and GPU fans flow through their coolers. If we do not have as much air coming into and going out of case as CPU and GPU coolers are passing through and heating up than some of that heated cooler exhaust has to be re-circulated through the coolers. This means the cooler run hotter because the air going through them is hotter.

Cases, especially those with filters, usually benefit from fans with higher static pressure ratings than stock fans... "cooler" fans instead of "case" fans.
Intakes are typically more restricted than exhaust; air filter, more restrictive grill, HDD cage, etc.
I prefer more intake than exhaust. And don't confuse number of fans with amount of airflow... or airflow with airblow

airflow is flowing cool air from intake to component and flowing hot air from component out of case without the hot air mixing with the cool air.

airblow is lots of fans blowing air with some of hot air from components mixing with cool air making it warmer resulting in warm air not cooling components as well as the cool air will.

Putting fans in case as intake and/or exhaust is only the first step. These fans only move air in and out of case.

This does not mean heated air is not mixing with cool air.

Nor does it mean cool air is going to where it is needed.

Getting the air to flow inside of case properly is even more important. We still need to manage where the air flows inside the case. We can do this several ways; deflectors, cooler intake fans, exhaust fans, removing vent grills, using fans with higher pressure/airflow, building ducts to or from CPU/GPU cooler, etc.

Using a remote temperature sensor to monitor what air temps are is the key to finding out where the cool air is flowing and knowing heated air is not mixing into it. By monitoring this we can than make changes to get airflow the way we want it.

I monitor the temps with a cheap indoor/outdoor wired remote or terrarium digital thermometer. Twist a piece of stiff insulated wire into the last 8" of sensor lead so you can bend it to position sensor where you want it... like 40mm in front of your GPU cooler/radiator intake.. to see what the air temp going into CPU / GPU cooler is compared to room temp. The closer it is to room temp the better.. Shouldn't be more 5c maximum, 2-3c is what I usually end up with after 30 minutes full load on both CPU and GPU. Warning: Spoiler! (Click to show)
Processed By eBay with ImageMagick, R1.1.1.M2a
post #3 of 12
Thread Starter 
Cheers buddy. I had actually already seen this posted by yourself once or twice. I had a good read, but still don't quite understand it (I am a bit of a simpleton).

Should I basically, put the fans in (but with more intake than I stated above) and then just test the temperatures, and go from there?

Also, do you know much about the SP/AF120 fans? I would like to know if I can have them set up as either intake/exhaust and still have the blue trim showing outwards?
Edited by RandalGraves - 9/6/13 at 2:46am
post #4 of 12
Basically you need to understand airflow through your case and how to position fans to accomplish it. Sorry, but there is no simple answer. I've tried explaining it in the tutorial. Maybe you can study it and than ask more specific questions and I will try to explain it better. Than I can include that in the tutorial.

I always use fans with good static pressure ratings. Reason is when blowing air through a case there is always something creating resistance. At the very least a grill that is similar in resistance to a many of the quietest coolers. And often with as much resistance as water cooling radiators... like an intake in front pulling air through a grill, than a filter/grill, than pushing the air through HDD cage, around cables, etc. Static pressure is the height water is when air stops moving... CFM is how much air fan can move with no resistance... like on top of a clean desk.
post #5 of 12
Thread Starter 
Okay, thanks for the help there mate. I will probably go and get a fan or two tonight, have a little play around and get back to you.

Just to be clear then, you'd recommend static pressure fans over airflow fans, as they tend to actually allow more airflow due to less resistance? (I understand this may be relative.)
post #6 of 12
Static Pressure fans because they flow more air when there is static resistance.

Let's say we have 2 80cfm fans; one is 1.00mm H2O and other is 2.00mm H2O

We mount them side by side being identical grills, filters with HDD cages behind then. All these add up to 1.0mm H2O resistance.

The 1.00mm H2O fan will not move any air.
The 2.00mm H2O fan will still be moving 40-50cfm (guessing).

Those figures are by no means accurate. Just an example of what static pressure and cfm mean in real life fan use. Here's another explanation:
http://martinsliquidlab.org/2013/02/18/why-static-pressure-max-flow-specs-are-poor-measures-of-fan-performance/
Edited by doyll - 9/6/13 at 4:16am
post #7 of 12
Thread Starter 
I may go ahead an buy 2 static pressure fans tonight then.
What would be the best way to test/trial fan positions. I.e. Should I play games/use my pc for a while before connecting the new fans. Check the temperature. And then replace the fans where I think they should go. And re-test. And from there just, basically, go on a trial an error rampage moving the fan around the cage, and gauging the temp?

I suppose I am essentially asking: Should I test the temp before and after putting in the new fan? Should I move the fan around the case until I find the coolest overall temp or is there something in particular I want to be cool? (CPU I am not too fussed about too much, as I soon will be getting a Corsair Water-Cooling system for that)
post #8 of 12
What GPU do you have and where is it on motherboard? I need to know in order to give knowledgeable suggestions.

Personally I wouldn't bother with CLC. They are no better than best air.. maybe 1-2c.. cost more by the time you change/add fans to get performance/silence, are noisier and are just not as reliable as good air cooling. Air coolers last forever and if a fan starts to act up you put a new fan on.. worst case you run on one fan while you get new fan. If CLC pump fails (most common problem) you have no cooling at all until you change coolers.


I'm waiting for my new Phanteks Enthoo Primo case (probably be another 6 weeks frown.gif ) .. it is arguably the most versatile and best entry level water cooling case made.. and unless my fairy godmother gives me high end water cooling components it will be air cooled. wink.gif
Edited by doyll - 9/6/13 at 6:46am
post #9 of 12
Thread Starter 
I have a P8Z77-M Pro Motherboard, and I currently have a Asus 560ti GPU. But I will be looking to upgrade this to either a 680 or a 770. The GPU is currently plugged into the PCI slot closest to the CPU (I would say that is PCI slot 1).

I am a really big fan (no pun) of Corsair (I have found them and Asus to be the most reliable for components). But, is there other Liquid Cooling solutions that work better than them and, therefore, greatly outperform air cooling? Without going for high end water cooling (I don't trust myself around water and electric at the same time)
The other thing is, I am a bit of a fiend for aesthetics, and find air cooling for CPU to look bulky and outdated. I have had a look at your Phantek CPU air cooler, and I just think it draws attention from the rest of the case. And if I put a £300 GPU or £250 worth of SSDs in there, I want to see them above all else tongue.gif
post #10 of 12
GTX 560Ti is still a good GPU! Probably still in the to 30 of GPU's I'm trying to find something like a used Gainward GTX 570 for my system... good performance and great looks.. but that's another story.. wink.gif

Assuming your 560ti has 2x fans on the side. The PCI slot is probably the 6th from bottom making it PCI slot # 2... and you may not even have a # 1 slot. wink.gif

GPU makes twice the heat your CPU does.

Good CPU coolers separate the cool air coming in front of cooler from the heated air coming out pretty good... GPU coolers suck (no pun cus the do) by drawing air in the fans, through cooler and scatter it in all directions... and the heated air coming out the bottom turns on mobo right back into GPU fan... What blow out the front either goes up to CPU intake or back into GPU, who know where it's going from the top... and back is only direction it might be going out of case without heating case air. mad.gif

So logically the GPU needs to be under water more than CPU. biggrin.gif

Anyways...
1x intake in side cover if your side cover vent is below the GPU.
2x SP's in front as that's the most restrictive airflow.
1x rear exhaust.
Try removing unused PCI slot covers to allow air to escape.. hopefully improving the cool airflow to GPU.
Maybe an intake in front top.. leave the back top empty. They front top may help with cool air to CPU. wink.gif
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