Solved: Airflow setup. Case fan and CPU cooler

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Venae

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Jan 22, 2009
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Hi!

I'm looking to get the airflow inside my PC case sorted out because I'm seeing some temperatures that are higher than I'd like them to be, e.g. CPU regularly reaches 60°C upwards. GPU and MB also get too hot.


But I don't know what fans are good or bad! I'm willing to replace the ones I already have but I definitely need some tips and advice.



I currently use my PC mainly for gaming, so something quiet but efficient is essential.


My PC case is a Fractal Design Define R4 Black Pearl, currently fitted with:

Front panel: 2 x 140mm fans (One generic LED, the other is a Silent Series R2 that came with the case)
Top: Space for 2 (140mm)
Side: Space for 1 (140 or 120mm)
Rear: 1 x 140mm Silent Series R2 that came with the case
Base: Space for 1 (140mm or 120mm)​

My PC Specifications
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8 Pro with Media Center, 64 bit
Processor: AMD FX(tm)-8150 Eight-Core Processor, AMD64 Family 21 Model 1 Stepping 2
Processor Count: 8
RAM: 16328 Mb
Graphics Card: NVIDIA GeForce GTX 560 Ti, 1023 Mb
Hard Drives: D: Total - 478519 MB, Free - 419005 MB; F: Total - 114470 MB, Free - 656 MB; J: Total - 953866 MB, Free - 720766 MB;
Motherboard: ASUSTeK COMPUTER INC., Crosshair V Formula
PSU: Corsair GS700 series
Antivirus: Windows Defender, Disabled​

My CPU is currently fitted with the stock cooler, and I'm planning to move from 1x SSD, 2x HDD to 2x SSD, and remove the hard drive cage.
 

Venae

Thread Starter
Joined
Jan 22, 2009
Messages
52
Pics of your current setup would help.
Pics attached.

How are these fans blowing?

What is your ambient room temperature?
Front fans are intake, rear is exhaust, all about 800-1000rpm. Ambient room temp varies between 18°C and 25°C+ approx, I don't have an accurate way of measuring.

Right now the heating has been on all day, and the CPU is 57°C, whilst MB is 34°C. Eek!
 

Attachments

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Right now the heating has been on all day, and the CPU is 57°C, whilst MB is 34°C. Eek!
Those temps aren't terrible, especially with any kind of load. Ambient temperature would also be a factor.

I agree with replay...3rd party CPU cooler would be a good idea.
 
Joined
Jun 19, 2004
Messages
7,800
You might also change your fans around. Negative air pressure is proven to lower case temps, not drastically but some.
 

Venae

Thread Starter
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Jan 22, 2009
Messages
52
Those temps aren't terrible, especially with any kind of load. Ambient temperature would also be a factor.

I agree with replay...3rd party CPU cooler would be a good idea.
It's not terrible true, but with this CPU the safe limit is lower than most, at 62°C. So I'm looking for an AM3+ cooler to replace the stock with, but having trouble finding one that will fit without being too close to the RAM sticks.

You might also change your fans around. Negative air pressure is proven to lower case temps, not drastically but some.
So, I'd have my two front fans as exhaust and rear as intake, or just reverse the front two? :S
 
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Your fan orientation is fine. Air comes in the front...out the back. Don't change it.

Would you consider closed loop water coolers like the Antec Kuhler? They're fairly cheap and in a push/pull fan setup, they are fantastic cooling solutions.

Here's my setup with a closed loop cooler on both the cpu (FX-6100) and gpu (GTX 550ti)

 

Venae

Thread Starter
Joined
Jan 22, 2009
Messages
52
Would you consider closed loop water coolers like the Antec Kuhler? They're fairly cheap and in a push/pull fan setup, they are fantastic cooling solutions.
I would love to have one, over a normal fan.

But now you've got me split between a Kuhler h2o 920 (£74), or a Noctua NH-D14 (£55) :)
 

Venae

Thread Starter
Joined
Jan 22, 2009
Messages
52
Hi!

I was tempted to get a Thermaltake Water 2.0 Extreme, because of future build plans, but since the D14 was half the price and did the job I needed I got that, and now it's been installed since Friday.

So I'm now seeing a big difference in temps =)

Before, on stock cooler, stock clock speeds (3.6 Ghz);
Idle - Core temp: 45°C upwards, Physical temp: Approx 61°C
Load - Core temp: 60°C upwards, Physical temp: Don't even go there, occasional shutoff @ 90°C

After, D14, overclocked (4.319 Ghz);
Idle - Core temp:6°C ~ 12°C Physical temp: 25°C or something
Load - Core temp 27°C +/- 5°C Physical temp: 51°C

Max temp I've seen so far is 51°C, whilst overclocked, playing Far Cry 3 at Ultra settings, with Fraps recording at 1:1. With prime95 running for a while highest core temp has been 46°C. Yay!


I have a couple of questions though.

1. In my case I have vents for 7 x 140mm fans. Clockwise: 2 Top, 2 Front, 1 Bottom, 1 Side panel, 1 rear. If I had 7 fans, what would be the optimal orientation? I.e. Would more intake make the D14 more efficient, versus outtake?

2. My motherboard has 8 fan connectors. 2 x CPU, 3 x Chassis, 3 x Optional. Connected to them are the D14 which take up the two CPU fan connectors and 4 x Fractal Design Silent Series R2 140mm fans (3 connected to Chassis, 1 to Optional). All are 3 pin.

But, I cannot control RPM of these fans, and only 3 of the 4 Fractal Design fans appear in BIOS (They aren't faulty, the BIOS just doesn't seem to acknowledge more than 3 fans). Is there something I'm doing wrong, or is this a limitation of the motherboard?
 
Joined
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More out is better, that creates negative pressure.

I would say going to a negative setup and adding a good heatsink / fan would solve your issue. Of course a water cooler is even better, but... That is water in your case that could leak and destroy your rig.
 
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