switch fan power supply

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koh_

Feb 15, 2018
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Hi everyone, I'm thinking of changing the fan from my "Cooler Master GX 650W" source.
However, the connector is 2-pin. I can not find fans of 2 pins here (I'm living in Brazil), only 3 pins.
Would it be any problem for me to cut the cable from the original 2-pin fan and couple it with a 3-pin molex?

Taking advantage of the occasion, should I use a fan with high pressure or high CFM? Maybe this Akasa Viper is enough?

Sorry for my English..

Thank you all.
15762_index_gg.jpg


Specifications:
- Dimension 120 x 120 x 25mm
- Bearing HDB (Hydro Dynamic Bearing)
- Speed 600 ~ 1900rpm
- Airflow 83.63 CFM (141.75 m3 / h)
- Noise level 6.9 ~ 28.9 dB9A)
- Current 0.17A
- Pressure 2.64 mm-H2O
- Service life 50,000 / hrs
- Double Bearing Ball Bearing
- 4-pin PWM connector (with RPM sensor)
- Voltage 12V
 
Solution
RememberThe5th
The main question is can you plug the 3PIN into 2Pin without connecting the "Green wire" also know as PWM signal, which sends how much does the fan rotate.
If the 2pin is +(red)-(black) and on your 3PIN also in same way + and - you can actually just plug it in (it must match the notch how you are connecting it).
Just discharge the PSU when you are taking apart because of the electric shock that may give you. (as you plug it in and doesn't match the notch and pins for positive and negative i suggest you the last option).

If it doesn't match up, then you can cut your old fan and wire it up to the new fan while cutting the green wire all the way soo it doesn't interfere with inner components.
This requires your Soldering iron, some solder...
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RememberThe5th

RememberThe5th

Illustrious
Jul 30, 2014
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The main question is can you plug the 3PIN into 2Pin without connecting the "Green wire" also know as PWM signal, which sends how much does the fan rotate.
If the 2pin is +(red)-(black) and on your 3PIN also in same way + and - you can actually just plug it in (it must match the notch how you are connecting it).
Just discharge the PSU when you are taking apart because of the electric shock that may give you. (as you plug it in and doesn't match the notch and pins for positive and negative i suggest you the last option).

If it doesn't match up, then you can cut your old fan and wire it up to the new fan while cutting the green wire all the way soo it doesn't interfere with inner components.
This requires your Soldering iron, some solder wire to solder, and probably shrink tube or electrical tape.
 
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