Im new please help, changing fans on psu

nigel101 · Post by **nigel101** » Sat Jun 14, 2008 10:01 am

Ive got a psu and going to change the fans to these, is there anything I need to know before doign it, ive read how to discharge the unit, is it them simple install and clip in 3/4pins??

PSU atx 450 td

Noctua NF-R8 80mm Quiet Case Fan 3 & 4 Pin Connection

what does a psu rpm run at?

bonestonne · Post by **bonestonne** » Sat Jun 14, 2008 12:08 pm

most power supply fans run through a temperature sensor, so there's no definite RPM. you'll have to cut and splice as well as solder and shrink wrap the positive and negative fan leads.

i've never seen a power supply with a 3/4pin plug in it, because of space constraints as well as power requirements.

nigel101 · Post by **nigel101** » Sat Jun 14, 2008 1:44 pm

i wanted why i saw someone on youtube solider the wires together. Just wanted to make sure the psu fan didnt run over 1800rpm. so i dont blow my psu.

alphabetbackward · Post by **alphabetbackward** » Sat Jun 14, 2008 6:19 pm

My Earthwatts has a 2 pin connector but I still used the fan from my Mini Ninja which is 3 pin.

The details on how I did it are found here:

http://www.silentpcreview.com/article83-page1.html

I think you just have to worry about the voltage for the fan and what starting voltage your fan can run at.

I remember the Mini Ninja fan could start as low as ~ 4 volts and the Earthwatts was running at ~5 at lower loads.

nigel101 · Post by **nigel101** » Sun Jun 15, 2008 12:41 am

Thanks, I think ill do it the simpler way of cutting the wires and solidering them.

Here is all the info on the fans im getting i think at the bottom is the starting fan volt??
Voltage Range 4-13 V
Is that right?

I dont know what mine is as I think they taken it off the market.
psu = atx-power 450 td

Noctua NF-R8 80mm Quiet Case Fan

Sound-optimised blade geometry and profile: The NF-R8 is the first fan employing a novel 80mm rotor which was developed by the Austrian Institute for Heat-Transmission and Fan Technology (Ã–sterreichisches Institut fÃ¼r WÃ¤rmeÃ¼bertragung und Ventilatorentechnik, Ã–IWV). Thanks to the special optimisation of the blade geometry towards ultra low noise application, the NF-R8 is up to 10% more quiet than current high-end fans at the same flow rate.

Self-stabilising oil-pressure bearing (SSO-Bearing): The NF-R8 series are equipped with a magnetically centred, self lubricating oil-pressure bearing that provides a new level of quietness and long-term stability

Features:

* Sound-optimised blade geometry and profile (Noctua Straight-Blade-Design)
* Self-stabilising oil-pressure bearing (SSO-Bearing)
* <7dB(A) minimum noise with supplied U.L.N.A.
* 22 CFM maximum airflow
* Includes 4 Vibration-Compensators
* 6 years warranty

Specifications:

Size 80x80x25 mm
Bearing SSO-Bearing
Blade Geometry Raised-Blade-Design
Rotational Speed (+/- 10%) 1800 RPM
Rotational Speed with L.N.A. (+/- 10%) 1300 RPM
Rotational Speed with U.L.N.A. (+/- 10%) 800 RPM
Airflow 31.2 CFM
Airflow with L.N.A. 23.0 CFM
Airflow with U.L.N.A. 15.3 CFM
Acoustical Noise 17 dB(A)
Acoustical Noise with L.N.A. 10 dB(A)
Acoustical Noise with U.L.N.A. 7 dB(A)
Input Power 1,32 W
Input Current 0,11 A
Voltage Range 4-13 V
MTBF > 150.000 h
Warranty 6 years
Bearing type -
Power connector 3-pin, 4-pin
Accessories Ultra-Low-Noise Adaptor (U.L.N.A.)
Mounting hardware included 4 Vibration Compensators, 4 Fan Screws
Rated voltage 4-13 VDC