Scythe Fans

Asulc · Post by **Asulc** » Sat Jan 26, 2008 3:55 pm

Looking around, I have seen alot of good remarks about the scythe fans. My question is what model, and what speed. Or maybe a different brand?

My soon to be set up
Antec P182
4 scythe fans
PC Power and Cooling 750 quad
Asus P5N32-E sli
MSI 8800gts 640mb
Intel E6600
OCZ Titanium 2x2gb 800mhz
Lian Li Rhoembus fan controller

To quiet the PC Power and Cooling 750 quad, what fan should I buy? A new PSU is not an option as my parents are limiting what I can buy and they bought this for me.
http://www.silentpcreview.com/article68 ... html#nexus
http://www.silentpcreview.com/article68 ... tml#scythe
Or a different one?

walle · Post by **walle** » Sat Jan 26, 2008 4:16 pm

Hi Asulc,

I would not recommend a fan swap in that unit; I would suggest that you instead sell it whilst afterwards getting a Seasonic or a Corsair unit. That PC &P unit is a very expensive piece of equipment which you should be able to get a fair amount of money for on the aftermarket. If itâ€™s brand new, send it back and replace it with a Seasonic or a Corsair.

This would be my best advice on this one.

Asulc · Post by **Asulc** » Sat Jan 26, 2008 4:27 pm

The power supply was purchased in November. I would rather not send it back because of the fact that my parents purchased it for me. "Thanks mom! I am glad that you spent so much money on this! Now where is you receipt so that I can return it?"

But if I did return it, what should I replace it with?

walle · Post by **walle** » Sat Jan 26, 2008 4:51 pm

Asulc wrote:The power supply was purchased in November. I would rather not send it back because of the fact that my parents purchased it for me. "Thanks mom! I am glad that you spent so much money on this! Now where is you receipt so that I can return it?"

I understand that, the unit do represent a large amount of money in more ways than one, and you should of course not insult your mum in any way.

Asulc wrote:But if I did return it, what should I replace it with?

I would suggest a Seasonic S12 500W or a CorsairHX 620W, would give you plenty or room.

Asulc · Post by **Asulc** » Sat Jan 26, 2008 5:33 pm

Ok, I am looking into returning the psu and getting a different psu.

What do you recommend in terms of the 120mm fans for the case? I have heard that the 800 rpm version of the scythe s-flex is best for quiet computers but also that is makes a clicking noise. Other people have said that the 1200 rpm version is better, and I can lower the speed with my fan controller. Also, how do these fans compare with the slipstream? If the slipstream is better, where could I get it in the USA?

Post by **NeilBlanchard** » Sat Jan 26, 2008 6:07 pm

Hello,

How are you planning on using the four fans? I think the Slipstream 500RPM and the 800RPM are great. One or two 800RPM units (controlled by the motherboard?) as exhausts and maybe one 500 (at 9-12v) for the intake would be plenty.

If you get a SeaSonic or Corsair PSU, then you probably won't need a fan in the lower section.

Asulc · Post by **Asulc** » Sat Jan 26, 2008 6:12 pm

I can't return the PC Power psu for a refund, only a replacement. So that is the power supply I will be using.

I was going to put two fans in the back of the case, one in the front in the upper chamber and one in the front in the lower chamber.
The fans are controlled by a fan controller.

Asulc · Post by **Asulc** » Sat Jan 26, 2008 6:59 pm

Looking around, I heard that the Scythe S-Flex 800rpm fan makes a clicking noise. Is this true?

I can get the 800rpm and the 1200rpm fans for the same price. Question is:
Get the 1200 and undervolt OR get the 800 and run it at stock?

continuum · Post by **continuum** » Sat Jan 26, 2008 8:49 pm

I haven't noticed the noise, at least not at stock voltage.

As for the PCP&C, if it's too noisy, sell it for something else. It's a nice PSU, but a fan swap could adversely affect its performance (e.g. it NEEDS the airflow going through it, and you can't violate the laws of physics by putting in a lower-flow/lower-noise fan... :p )

Asulc · Post by **Asulc** » Sat Jan 26, 2008 9:35 pm

you haven't noticed the noise on what model?

Lou_H · Post by **Lou_H** » Sat Jan 26, 2008 10:58 pm

I have the S-Flex D 800 rpm and the S-Flex E 1200rpm fans, but have not tried the Slipstream fans yet. There is also the S-Flex F 1600 rpm fan. They all seem to be the same noise when run at the same rpm. They are almost inaudible at 600rpm or less. >800rpm they start to make more noise than you would want for a very quiet PC.
I didnâ€™t realize there was a clicking noise with the 800rpm fan so I ran it very slow and I had to put my ear a few inches away to hear it.

It seems the S-Flex fans are all the same fan, but the voltage is reduced internally to give different speeds. So if you try to put less than 5volts to the 800-rpm fan it will stall. It actually needs 8.9v to start it spinning, so unless you have a speed controller like the Noisemagic that gives an extra boost of 12v to start, then you will not want to use a speed controller on an 800rpm. For my motherboard the system fan gets voltage between 5 volts (idle temp) and 9volts (load temp) so a 1200rpm fan works good and runs between 400-850rpm. If I want the fan to run faster for extra cooling then I would have to use a 1600rpm fan so that at 9volts its running at 1100rpm.

I have the P182 with no dust screens or vent door, one exhaust fan (S-Flex1200 at 600rpm), one intake fan (S-Flex1200 at 500 rpm), no lower bay fan for HDD.

E6850 no OC with Thermalright 120 Ultra E and a Noctua NF-P12 fan (about the same noise and performance as the S-Flex1200)

Gigabyte p35 MB, 4GB Corsair 800@4-4-4-12

8800 GT 512mb with Arctic Cooler S1 and one S-Flex 800rpm fan

Corsair HX620 watt PSU (the HX550 would be enough power but I already had the HX620 and they are both very quiet.

So thatâ€™s three S-Flex fans and the PSU fan, but I could actually run it without the VGA fan or maybe even the intake fan if the ambient temp does not get too high.

My guess is your PSU is going to make more noise than an S-Flex >900rpm.
If your running any of the stock hsf on the CPU or graphics card then those will also be considered loud compares to the fans.

Post by **NeilBlanchard** » Sun Jan 27, 2008 5:03 am

Hello,

I would get three 800RPM Slipstreams (back and top rear, in the middle of the lower chamber) and I'd get one 500RPM for the front intake. They are very quiet, and they should cool things very well, too.

Asulc · Post by **Asulc** » Sun Jan 27, 2008 2:24 pm

Everyone has been very helpful. Thank you for all of the quick responses, and even for the ones that were not so quick.

I have made my decision and will be getting the scythe slipstream fans. I will also be doing lots of modding to the case (nothing that will make it louder, don't worry). I will probably have it done sometime during the summer. I will post pics then.

KenAF · Post by **KenAF** » Thu Jan 31, 2008 3:25 pm

Neil,

For the Ultra 120 Extreme, do you feel the Scythe Slipstream 800rpm is more desirable than an undervolted S-Flex SFF21E? Or should I opt for an undervolted Slipstream 1200rpm?

I intend to overclock my E8400 to 3.6GHz.

Post by **NeilBlanchard** » Thu Jan 31, 2008 5:06 pm

Hello Ken,

Unfortunately, I don't know. It might be wise to get the 1200RPM for the headroom, and if it is too noisy, or you really do not need the speed, then get the 800RPM?

KenAF · Post by **KenAF** » Thu Jan 31, 2008 9:05 pm

NeilBlanchard wrote:Hello Ken,

Unfortunately, I don't know. It might be wise to get the 1200RPM for the headroom, and if it is too noisy, or you really do not need the speed, then get the 800RPM?

Thanks, I ordered both.

I will report my results.

Wibla · Post by **Wibla** » Thu Jan 31, 2008 11:16 pm

I just recently discovered the S-FLEX fans for my own use, and I'm pleasantly surprised.

They get abit noisy aboive 800rpm, but there's usually no need to run them that fast. I got 3 1200rpm fans and I'm using two in my Solo setup - very happy with that setup. I usually run them at about 400-600rpm, one in front of the drives, one as exhaust.

If you have a fan controller, you should get the E/1200rpm version and just undervolt them. They will run - and report - rpm down to about 200rpm (YL fans will report down to about 300). This is tested on an Asus P5W DHD mobo - one of the best mobo's for fan control.