Controlling S-Flex E as CPU fan on P5B Deluxe

Morten74 · Post by **Morten74** » Sun Jun 17, 2007 12:33 am

Hi all

I got my new system put together last night (pictures will posted later), but the 2 S-Flex E (1200rpm) fans (case and CPU) are making a little more noise than I would like. When I enable the ASUS Q-Fan (silent mode) in the bios, the case fan drops to a nice approx. 800rpm, but the CPU fan (mounted on a Thermalright Ultra-120) remains at 1200rpm. The CPU temp (according to the bios is around 40 degrees C). I suspect that the problem is that the S-Flexs only have a 3-pin connector, and the CPU fan connector on the mobo is a 4-pin; the 4th pin not connected to the fan is labelled "CPU fan PWM".

Does this mean that the S-Flex cannot be controlled by the P5B Deluxe if used as CPU fan??? -Or is there some clever work-around, maybe using Speedfan ? -Or do I need something like a Fanmate2 to manually controll the CPU fan?

Thanks in advance

Best regards
Morten

Kristian · Post by **Kristian** » Sun Jun 17, 2007 2:15 am

Depending on what your BIOS will allow you can can disable the CPU fan warning and move the fan to another connector.

SebRad · Post by **SebRad** » Sun Jun 17, 2007 2:40 am

Hi, I have a P5B series board and as far as I can tell the CPU fan has to be 4 pin for it to be controlled (either by bios or Speedfan). As sugested I would disable the CPU fan warning and connect the CPU fan to a case fan header with can be controlled by the BIOS or Speedfan. (Speedfan 4.32 and later needed and turn Q-Fan in BIOS off). Downside is that all the case fans are on a single control so the case fans get same % speed as CPU fan, this may not be too much of a problem though.
Alternatively fix the case fans and leave the CPU fan under control of Speedfan.
Arctic Cooling make a range of PWM fans that are reasonably priced, if you find for sale anywhere...
Good luck, Seb

71monaro · Post by **71monaro** » Fri Jun 22, 2007 10:20 pm

Skythe have a new range of PWM 4 pin fans coming. Although they are normal sleeve bearing, so i may not want to mount horizontally on my XP120 in HTPC case.
check out
http://www.scythe-eu.com/en/press-room/ ... -fans.html

falcon26 · Post by **falcon26** » Sat Jun 23, 2007 11:14 am

I had that same fan too and thought it was loud. I returned it and got the one just below it the 21D I think it is. Its only 800 rpm's and its dead quiet and cools my cpu almost as good as the 1200 rpm one. Try retuning yours and getting that one...

jaldridge6 · Post by **jaldridge6** » Sat Jun 23, 2007 1:17 pm

i can attest that the 800rpm scythe fan is very quiet. It is not inaudible, especially in a thin case.

Lt_Dan · Post by **Lt_Dan** » Fri Jun 29, 2007 7:33 am

Hi,
I can't control my Scythe fan with speedfan for some reason.
is there another program that can do the job?
or maybe i need to configure speedfan somehow?
my mobo' is a Gigabyte 965p-ds3p.
although it has good airflow, the noise is more then my previous Zalman 7700 when undervolted.
Thanks!
Edit - can i connect my FanMate 2 to the scythe?
thaks again.

thejamppa · Post by **thejamppa** » Sat Jun 30, 2007 1:10 am

Lt_Dan wrote: Edit - can i connect my FanMate 2 to the scythe?
thaks again.

Yes you can.

Lt_Dan · Post by **Lt_Dan** » Sat Jun 30, 2007 1:41 am

thanks.
i'll try.
what program can i use to view the rpm of the fan - speedfans' readings are weird.