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Do I want a temperature controlled fan for the intake?


Guest Daveandrew_merged
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Guest Daveandrew

I think the title pretty much sums it up, I'm shopping for new fans and I'm trying to figure out if it would be silly to get a temp controlled fan. I mean don't you want the intake fan to be sucking in fresh air continuously?

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No, because the fan will never reach a high rpm because the air near the intake will always be near ambient temperature. Temp-controlled fans only good if placed directly on a heatsink.

 

My opinion is they are not good on any application either because it will not keep temperatures down until they already heat up. A better solution would be to find the right rpm to keep the air circulating before things heat up. I prefer constant rpms or manual controls to keep noise down. Constant hum noise from fans eventually go unnoticed as your ears become accustomed whereas changing rpm's without you knowing immediately draws your attention. Better to keep your attention on your software applications in my mind.

 

Very good point Fast Hot Rod. A remote mounted thermistor would cancel my concerns 50%. The variable speed changes could still be annoying but the RPM's would be appropriate for the temperatures. Cheers,

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I'm using a Thermaltake A2018 fan for both intake and exhaust. (120 mm)

 

They come with a thermal sensor that you can remote mount in a hot location to control the speed of the fan, or a plate that you can install in a rear expansion slot. The plate holds a small speed control adjustment knob so you can fine tune the speed of the fan. (Mine run upwards of 2480 rpm at full speed.)

 

I run them both at high speed when benching, and slow down the rear exhaust fan under normal conditions. The 120 mm fan in my PSU helps with exhaust, so I really need more on the intake side to create a positive pressure in my machine.

 

Hope this helps.

 

Mark

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