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do you need to balance cpu cooler fans with case fans?

post #1 of 7
Thread Starter 
I'm just wondering what the effect is when you have high rpm/cfm fans on the cpu cooler set on an aggressive curve, while the case fans are much lower rpm/cfm. For example if I have two TY 143s on the D14 and just one TY 140 as an exhaust at the upper rear, will the D14 pool a lot of hot air that the TY 140 can't push out fast enough? In that setup, should I mount a second top-back exhaust to go with the upper rear exhaust, or perhaps leave the top- back fan mount open so air can escape?

I have three intakes btw, two in front that are obstructed heavily by full hdd cages, and a TY 140 on the bottom. I might add a fourth intake on the side that will be low cfm.
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post #2 of 7
What is the air temperature in your case? Like in front of the D14 intake fan? It's very possible your intake fans are pushing enough air through the case and there is no hot air buildup.

If there is a heat buildup you could run any PWM case fans on same PWM signal you run your TY-143 fans with. This would speed them up and move more air when the TY-143s' speed up. wink.gif
post #3 of 7
Thread Starter 
I don't have a way of monitoring air temp inside case, I assume you need to hook up a sensor for that? I just use the standard monitoring apps like gpu-z and AI Suite. So I only get a range of cpu data, mb, and gpu.

Cpu temps are good I think, 4670k stock, low to mid 20s idle, mid to high 40s running prime95 stress. So I'm not worried there, the D14 with TY 143s seems to do a good job, and I'm still looking for a decent gpu that runs at low to mid 60s at game load on air, I've been told that's delusional but I'll under clock and or undervolt if I have to, or accept higher fan noise.

Mobo will be at 27 - 30c idle, 35c gaming, I forget what it hit on prime95 bit it might have been 40c. I've always been told keep mob temp below 40 which prompted this question. Wondering if adjusting case fans might get me lower mb temps. I don't even know how informative the mb temp monitor on AI Suite is. What is the best way to gauge whether there is heat buildup inside the case?
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Crucial m500 SSD LG GGC H20L Bluray/HDDVD combo drive Watercool Heatkiller IV Pro all copper Alphacool NexXxoS XT45 420 radiator 
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Alphacool NexXxoS XT45 280 radiator Watercool Heatkiller GPU-X3 290X Windows 8.1 Qnix QX2710LED 27" 2560x1440 monitor 
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post #4 of 7
Asus DCUII run cool and quiet... as do most of the new 3x fan GPUs. I'm using TY-143s on my TC14PE and they never run above 950-1100rpm@43-48c, even at 100% load on all 6 cores when rendering graphics.

I use a cheapie digital indoor / outdoor wired remote thermometer with a 20cm stiff insulated wire braided into probe end and a plastic clothspin to position it where I want it. Air temps going into coolers should only be a couple degrees warmer than room.
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post #5 of 7
Thread Starter 
I had the Asus DC2T 280x and I returned it because it's too long to fit the hdd cage on the Define R4 rotated for front fan airflow. But I might repurchase it, I can't find another 280x card I like. But the Asus 280x TOP doesn't run that cool IMHO, fan is set to max at 45% (where it's pretty much in audible) and load temps are in the low to mid 70s. There are other 280x cards that run much cooler, albeit noisier. Toxic and Vapor X 280x fans are set to max at 70% for example, and the cards are cooler than the Asus TOP, much louder too of course. There are 280xs that run in the low 60s at load, tho with much lower clocks than the Asus TOP - 850 vs 1070.

Anyway -- what are your mb temps like? It occurs to me the Asus card recorded higher temps in my system than the reviews due to poor airflow. I was getting mid to high 30s idle and 75 at full load. Pretty much all the reviews report lower temps than those numbers.
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Alphacool NexXxoS XT45 280 radiator Watercool Heatkiller GPU-X3 290X Windows 8.1 Qnix QX2710LED 27" 2560x1440 monitor 
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CPUMotherboardGraphicsRAM
Intel i5 4670k Asus Maximus VII Gene Powercolor PCS+ AXR9 290 Crucial Ballistix Sport Very Low Profile 
Hard DriveOptical DriveCoolingCooling
Crucial m500 SSD LG GGC H20L Bluray/HDDVD combo drive Watercool Heatkiller IV Pro all copper Alphacool NexXxoS XT45 420 radiator 
CoolingCoolingOSMonitor
Alphacool NexXxoS XT45 280 radiator Watercool Heatkiller GPU-X3 290X Windows 8.1 Qnix QX2710LED 27" 2560x1440 monitor 
KeyboardPowerCaseMouse
Logitech K360 wireless keyboard EVGA 1000w P2 Phanteks Enthoo Primo white Logitech Performance MX wireless mouse 
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post #6 of 7
Well my motherboard is old school X58A-UD5 so runs around 47-53c I have to keep idle speed at 700rpm or above for 50c. Load is often lower than idle temp because of increased fan speeds / airflow over motherboard. .
Edited by doyll - 11/19/13 at 2:23pm
post #7 of 7
There is no measurable difference. The pressure difference you will get is negligible and is more imputable to the air density varying with temperature.
A higher air flow will generate more turbulence which is good between the fins of a heatsink but not for your case air flow.
I personally think the quieter, the best. If you want to cool a particular motherboard component (the MB temperature is usually the VRM), just put a fan in front of the component. I had a tiny fan, secured with zip tie blowing directly on the VRMs. I gained something between 10-15C. Trying to cool this very specific component by increasing your case air flow is ineffective.
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