Corsair 540 Air Case Auto-Cooling Solution

MyNewRig

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May 7, 2013
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Hi Guys,

I think i am starting to drive myself crazy here as i have been researching this for 3 days now and i think i am getting even more confused as i check new information.

I have my mind set on this case and will order it directly from Corsair later today as i live in Europe and retailers here don't have it yet, it happens that Corsair is running an offer for $30 off this case if you order fans with it, the fans available for ordering with this case are:

- 2X AF120 Performance Edition / Quiet Edition
- 2X SP120 Performance Edition / Quiet Edition
- 2X SP120 PWM Performance Edition / Quiet Edition
- AF140

My goal is to have as silent as possible system in idle (watching movies, Youtube, text editing or just totally idle) which is how the system is 90% of the time, and maximum cooling performance regardless of noise level in high workloads for my GPU/CPU/RAM.

- I have the EVGA GTX 780 SC with ACX cooler which is an open cooler and dumps massive heat inside the case
- i5 4670K with the Hyper 212 Evo running in push only with its single stock fan
- G.Skill TridentX 2400Mhz CL10 RAM which would also use some cooling as they are high performance and i assume they would heat up if not cooled properly.
- Gigabyte GA-Z87X-UD3H
- I do not intend to water cool currently so all my fan mounting locations are unoccupied.

This case comes with 3 low RPM AF140L 3-pins voltage fans that would run at 100% all the time when plugged into the motherboard and i would like to better this situation using the Corsair fans offer which is making me very confused, Now there are few points which i need your opinion on:

1) Would getting SP fans better than AF fans? since i will be using these separately bought fans as front intakes and as i understand since they have to pull air through the front filter they need to be SP fans?

2) SP120s high performance fans would provide better air flow that the two included 140s low RPM AF fans?

3) Should i get high performance 2350RPM fans or quite 1450RPM ones?

4) Should i get the PWM version or the Voltage controlled version with the resistor to slow them down when needed?

Now this fourth point is the one i am most confused about, I know that i have few ways to deal with fans, either use uncontrolled fans and get the specs i want out of the box running at 100% or control them with resistors which are unfavorable methods to my understanding, the more advanced ways is to buy a dedicated fan controller like some of you guys have done here or best of all worlds is get PWM fans and have the motherboard control them automatically.

Also should i get high performance noisy fans if they are PWM controlled anyways and slow them down through the PWM profiles in idle? or get quite fans that its RPM IS already capped out of the box in case PWM control in the motherboard is not good enough i will get quite fans anyways at the cost of much less performance under load?

Now this motherboard has three 4-pins speed controlled fan headers but the big problem is that they control the fan speed based on the system temperature sensor and not the CPU/GPU sensors, also the fan control formulas are strange and i could not understand them,

Below i will post information from my motherboard manual as well as the pin assignment of the headers and leave it to you guys to kindly guide me in the right direction.

My plan is to use two SP120 high performance fans as front intakes which run at a max of 2350 RPM at full speed (TOO NOISY) and control their speed automatically via the motherboard's BIOS PWM fan control features or at least digitally slow them down, two of the three AF140L that come with this case as one rare exhaust and one top exhaust or use only the one rare exhaust and keep the other two as spare parts to replace it when it wears out which i suspect would happen rather quickly as it would be running on 100% speed 24/7, the idea being that the two front intakes would slow down and become silent when the system is idle and spin to provide good air flow when the system is under heavy workloads like gaming or rendering or such...

Some people with 7 series Gigabyte motherboards say that the fan control feature of their boards sucks as being tied to system temperature instead of CPU/GPU temperatures make them NOT change speed as they claim that system temperature sensor still provides low reading even when the GPU/CPU are in full load and heat up. i have not found any reports on the 8 series boards to date so i have no idea if things got improved.

I am really confused as what type of fans to order with the case and how to set them up to achieve my goal of low noise in idle and high performance in heavy workloads while having all of this on automatic control.

Here are my motherboard information from the manual:


SYS_FAN1/SYS_FAN2/SYS_FAN3:
Pin No. Definition
1 GND
2 +12V /Speed Control
3 Sense
4 VCC


SYS_FAN4:
Pin No. Definition
1 GND
2 +12V
3 NC


1st System Fan Speed Control (SYS_FAN1 Connector)
Allows you to determine whether to enable the fan speed control function for the system fan connected to the SYS_FAN1 connector and adjust the fan speed.

Normal Allows the fan to run at different speeds according to the system temperature. You can adjust the fan speed with EasyTune based on your system requirements. (Default)

Silent Allows the fan to run at slow speeds.

Manual Allows you to control the fan speed under the Slope PWM item.

Disabled Allows the fan to run at full speeds.

Slope PWM
Allows you to control the fan speed. This item is configurable only when 1st System Fan Speed Control is set to Manual. Options are: 0.75 PWM value /oC ~ 2.50 PWM value /oC.


2nd/3rd System Fan Speed Control (SYS_FAN2/ SYS_FAN3 Connectors)
Allows you to determine whether to enable the fan speed control function for the system fan connected to the SYS_FAN2/SYS_FAN3 connectors and adjust the fan speed.

Normal Allows the fan to run at different speeds according to the system temperature. You can adjust the fan speed with EasyTune based on your system requirements. (Default)

Silent Allows the fan to run at slow speeds.

Manual Allows you to control the fan speed under the Slope PWM item.

Disabled Allows the fan to run at full speeds.

Slope PWM
Allows you to control the fan speed. This item is configurable only when 2nd/3rd System Fan Speed
Control is set to Manual. Options are: 0.75 PWM value /oC ~ 2.50 PWM value /oC.


What do you guys think are my best configuration out of all these possible components given that to get the $30 discount i have to either order a pack of two 120s or one 140

Thank you very much in advance :)
 

MyNewRig

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can you provide some specifics? is this a manual or auto controller? how does it control stuff? CPU/GPU sensors used? should i get SP or AF fans for front intakes? High performance vs. quite fans? 120mm vs 140mm? I think this is short enough :)
 
Did u read the product description? You can set it to manual or auto.

Don't change the fans. Add one fan that's the same as the other three in the upper rear slot. You'll have a ton of airflow and all components will stay cool. You can make the 5th connector a temp sensor near the gpu and set the fans to go faster as it heats up.

I realize you're enthusiastic but it's not really necessary to over-analyze this :)
 

MyNewRig

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Like i told you the stock fans will run @ 100% all the time without a controller and they get noisy, also if i slow them down with a controller they will start getting inefficient and since i already have a promotion going that will allow me to get better fans almost for free i prefer to go this way.

One final question about fan controllers in general, the one you posted or the other known ones, will they be able to control PWM fans as well or only voltage controlled ones?

The reason i am asking is that i am thinking of ordering the SP120 high performance fans that run at a loud full 2340 RPM, try to control them through the motherboards PWM headers, if this is not successful, then i try to control them with the CPU's PWM signal by using a PWM splitter, if that is again unsuccessful then i plug them into the controller with the other stock 3-pin fans that come with the case.

The question is, will the controller be able to control PWM fans alongside the 3-pin fans? i think this will help me conclude the fan decision...

Thanks
 

Som3one

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Jun 13, 2013
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First things first: You would probably be better off with AF fans. Those SP fans are optimized for use on radiators.

Doesn´t your mainboard have some kind of basic build-in fan controller?
If not, getting a fan controller would be your best choice. I personally went for one that was able to turn the fans off completely, so that the CPU and GPU coolers are the only noise sources while idling.
 

MyNewRig

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You raise some excellent points here, being able to turn fans completely off in idle is optimal as case cooling is really not needed at this time when components temperature are in the low 30s, what controller is that? and how can it detect idle/load stats?

Motherboard is supposed to have control for PWM fans but that is tied to the "system temperature" sensor which might not be ideal, again how does your controller work?

Everybody is saying to get Static Pressure fans for front intakes since they have to pull air through a thick filter in the front, also to create positive pressure inside the case so that vents would exhaust air outside instead of sucking air in keeping the system dust free ...

This is what i have been told are the reasons for going with SP fans instead of AF fans.

I appreciate more input .. thanks :)
 

Som3one

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It depends on your motherboard how it controls the fans and which sensors it uses.
For example, my last motherboard was a Z68 from Asrock which had 3 or 4 fan connectors that could be controlled (2 being PWM I think) and it would use the CPU temperature for all of them. This did indeed work pretty good but - like you - I wanted my system to be super quiet in idle.

So, I got myself the Scythe Kaze Server 5.25 fan controller which was (and still is) and awesome little thing for that price. As with most other fan controllers, you connect your fans to it and place the temperature sensors at the desired places in your case. Then you can set an target temperature and it basically does the rest, including turning the fans off if so desired.
Or you can control them manually, of course.

My current motherboard - Asus Z87 Sabertooth - has all these functions included. Fortunately. ;)
 

MyNewRig

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actually i did not need any "controllers" i just plugged them into the motherboard, and setup their profile to "quite" in the BIOS and they work wonderfully, they go to 700RPM when the system is not under load, some load and they go to 900RPM and when gaming they run at full speed once heat start building up, so out of the box turned out that things worked beautifully without the need for any controllers of any sort.

I use the NZXT Hue in this case and it matches very nicely but has a horrible build quality as one month down the road now and i need to RMA it because the Green and Blue leds turn off every time i restart the system :)

It is a really nice case but HUGE.