Corsair CX400w fan swap

PSUs: The source of DC power for all components in the PC & often a big noise source.

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BlackWhizz
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Corsair CX400w fan swap

Post by BlackWhizz » Mon Jun 21, 2010 3:54 am

Hello,

After listening in a evening to my pc i discoverd my PSU was the source of the noise of my pc.

I was wondering what the best fan is as a replacement fan for my Corsair CX400w.

Scythe Slipstream 1200 or Slipstream 1600.

I probably will use my pc close to max power (Q6600, HD5770 [8600gt gets out soon], few hdd's and a fan controller).

Im thinking to get the 1600 rpm one because SPCR says it runs quiet/inaudible at 7v. The PSU runs the fan mostly on 7v.

b_rubenstein
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Post by b_rubenstein » Mon Jun 21, 2010 5:15 am

The Slipstream uses a plain bearing and doesn't have a very long life mounted in a horizontal position. That's the reason for the S-FLEX F (1600 rpm) being recommended most often for this application. It also has a higher static pressure, which is appropriate for cooling a PS. (If I was going to replace a 120mm PS fan today, I would use a 1800 rpm Gentle Typhoon.)

BlackWhizz
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Post by BlackWhizz » Mon Jun 21, 2010 9:02 am

1800RPm GT sounds quite loud. But i will go look in for s-flex.

They are quite expensive (20 euro's a piece. Price of a noctua). GT 1450 is 15 euro. Is that also a good replacement fan?

b_rubenstein
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Post by b_rubenstein » Mon Jun 21, 2010 3:36 pm

All PS's have a fan speed control circuit that is usually based on a temperature reading in the PS. The fan will almost never run at full speed unless it is under full rated load and the ambient temperature is high. The S-Flex F in my HX-520 barely spins a a few hundred RPM. The 1800 RPM GT would also be inaudible under all but the highest loads. If you use a fan with too low a maximum speed, it may not be able to properly cool the PS.

BlackWhizz
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Post by BlackWhizz » Wed Jun 23, 2010 12:40 am

Is a GT 1850 silent at 7v?

b_rubenstein
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Post by b_rubenstein » Wed Jun 23, 2010 4:45 am

BlackWhizz wrote:Is a GT 1850 silent at 7v?
No. No operating fan is silent.

BlackWhizz
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Post by BlackWhizz » Wed Jun 23, 2010 9:04 am

b_rubenstein wrote:
BlackWhizz wrote:Is a GT 1850 silent at 7v?
No. No operating fan is silent.
Whatever.

Is a GT 1850 quiet at 7v?

doveman
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Post by doveman » Wed Jun 23, 2010 9:26 am

Sorry for the slightly off-topic question, but are there any good but cheaper fans that I could use horizontally, but not in a PSU (IE a bottom intake fan)?

b_rubenstein
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Post by b_rubenstein » Wed Jun 23, 2010 10:47 am

BlackWhizz wrote:
Is a GT 1850 quiet at 7v?
Probably. How do you know it will be getting 7v? Are you going to manually set the voltage?! It will probably spin faster than necessary much of the time, when it isn't spinning fast enough the other. It's not like manually setting the speed on a CPU fan where there are sensor reading for the CPU temps. You'll be working blind with a PS.

BlackWhizz
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Post by BlackWhizz » Thu Jun 24, 2010 6:17 am

b_rubenstein wrote:
BlackWhizz wrote:
Is a GT 1850 quiet at 7v?
Probably. How do you know it will be getting 7v? Are you going to manually set the voltage?! It will probably spin faster than necessary much of the time, when it isn't spinning fast enough the other. It's not like manually setting the speed on a CPU fan where there are sensor reading for the CPU temps. You'll be working blind with a PS.
Probably :? No, but i already put the psu open and have a fan lying on it. My multimeter says on normal uses (gaming a little) the fan runs on 7v.

Arbutus
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Post by Arbutus » Thu Jun 24, 2010 2:49 pm

At 7 volts the Scythe Gentle Typhoon 1850 is spinning about 1100 rpm and is is on the verge of getting noisier. A great fan review is here:

http://www.xbitlabs.com/articles/cooler ... html#sect0

The Scythe Gentle Typhoon has the most non-annoying noise signature that I know of.

BlackWhizz
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Post by BlackWhizz » Wed Jul 07, 2010 8:03 am

I ended up selling my old PSU to my parents (their psu did the smoke trick). And im getting the OCZ ModXStream PRO 500w.

- 135 mm fan (so i can swap it with a 140mm fan if i want :))
- Modular
- Quiet (according to coolhand from this forum)

Hope my pc is inaudible soon :)

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