Difference between these?

kitkat9933 · 22 Apr 2013 at 22:57

YOUR BASKET
1 x Corsair Fan, SP120 PWM High Pressure Fan 4 pin, Dual Pack (CO-9050014-WW) £25.99
1 x Corsair Fan, SP120 PWM Low Noise High Pressure Fan 4 pin, Dual Pack (CO-9050012-WW) £25.99
Total : £54.96 (includes shipping : £2.48).

What's the difference between these anyone know?

Doomedspeed · 23 Apr 2013 at 10:06

The high pressure pack uses performance fans which are faster but louder, the low noise pack uses the quiet edition fans which are quieter but slower.

I have a spare set of the quiet editions, great fans.

Yaayuh! · 23 Apr 2013 at 10:13

If they are PWM then you may as well get the faster/louder fans and dial them down.

doyll · 23 Apr 2013 at 11:51

What Rossi said.

That way if sometime in the future you want more air somewhere you have fans that will supply it.

Resident · 23 Apr 2013 at 13:09

I have the older 3pin version of the high pressure fans and thanks to Tealc's cleverness I have them on PWM via a converter he designed and built.

When run under 1300rpm they're just as quiet as the quiet edition.

kitkat9933 · 23 Apr 2013 at 15:43

Rossi~ said:
If they are PWM then you may as well get the faster/louder fans and dial them down.

That's sort of what I meant by the question. If they are PWM fans, surely when being controlled by a PWM controller the faster ones can be slowed down to a similar speed to the low noise ones, but also come with a higher max RPM.

So essential the low noise ones are pointless, since the higher pressure ones can be controlled to act like them? Does that make sense lol?

Resident · 23 Apr 2013 at 18:13

kitkat9933 said:
That's sort of what I meant by the question. If they are PWM fans, surely when being controlled by a PWM controller the faster ones can be slowed down to a similar speed to the low noise ones, but also come with a higher max RPM.

So essential the low noise ones are pointless, since the higher pressure ones can be controlled to act like them? Does that make sense lol?

Yes it does. It's the reason I went with the performance over quiet. Like you say, the performance ones, when controlled to a lower RPM will give similar results in terms of noise and performance as the quiet ones.

The benefits of this are that:

1. If you NEED the performance of full speed, the overhead is there to use.
2. Quiet ones run at ~1100rpm @ 12v. Performance ones will run around 1100rpm at a much low voltage. I haven't tested the voltage output on my converter so I can't be sure of the exact voltage, though I'd guess sub 7v.