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COUGAR 12CM Green LED fans and water cooling help

post #1 of 2
Thread Starter 
hey everyone i am kinda new when it comes to water cooling, building a new rig and i was going to put a XSPC RayStorm 750 AX240 Water Cooling Kit in it but i wanted to use different fans and i tried to find out more about the fans i would like to use but started finding out that not all fans are the same.. i would like to use http://www.newegg.com/Product/Product.aspx?Item=N82E16835553011 but are these alright for the rad or are they more of a case only fan? and if so what do you look for when picking out fans for the rad?
post #2 of 2
When picking fans for WCing three things matter:
Size: It has to fit the rad.
CFM: Cubic Feet per Minute, ie., how much air the fan will move.
Pressure: Usually listed in inches or milimeters of water.
RPM (Revolutions Per Minute) has no bearing on fan performance. It's a useless spec that means nothing.
Note that, generally, the more air a fan moves, the louder it will sound.

That's the easy part!
P-Q Curve
A quick look at the above will show you that the more resistance to it's air flow a fan sees, the less air it will move. Every model rad has a different resistance to airflow, generally depending on three things, thickness, the spacing of the fins, and the air flow (more air flow = more resistance). Further, the performance of all rads (how much heat they will remove) is dependent on how much air flows through them.

So you have to pick a rad that will remove the amount of heat you want to remove, determine how much air flow the rad needs to do that, and then choose a fan that will deliver the required air flow at the resistance of the rad at that airflow.

And, buy the way, you have to do the same thing with pumps (they have P-Q curves too).

Hope that helps........
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
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