RIVA Chasis/OPT Fan Problem

[DerStig]

I am having a problem controlling the fan speeds of my fans that I connect to the CHA or OPT fan headers (CPU and CPU OPT works fine).

I have 12 fans on my case (3x480 rads), I have 3 of these : http://www.frozencpu.com/products/14982/cab-627/EK_4-Pin_PWM_4-Way_Splitter_Cable_-_Sleeved_Black_Bl....

Therefore, as far as RIVA is concerned, I got 3 of the 4 pin fan connectors. 2 of these are connected to CPU and CPU OPT, they work great. The 3rd one is however always runs at max speed, it doesn't matter if I connect it to CHA 1 2 3 or OPT 1 2 3. What am I doing wrong?

I am really frustrated, this is a $429 board.

[sectionate]

On my board (crosshair v)if I leave OPT (PWM) fan controls at disabled my fans always work at 100% when plugged into those ports. If thats what your trying to do

[Retired]

Are you trying to pwm control the chassie fans? or the opt fans?

it would be way more easy if you told us

Take the pwm signal from the cpu_fan header..

Or get a pwm fan controller?

You cant use the opt and chassie fans as cpu_fan, and want them to adjust after cpu temp..

You can connect a temp prob to one of the opt fan header, and having that header temp controlled.. Stick the probe into the rad or something

pwr_fan> constant 12v feed
Cpu_ fan> cpu temp controlled
Opt-cpufan> optional cpu fan, it tag along with cpu_fan
Chassi fan> For using chassi fans, can be duty controlled and via profiles
Opt fans> Optional fans, can be used everywhere, and for having them adjust to the temp, you need a temp probe. else they can be adjusted via duty, and profiles also

i told you this already?

Or get a pwm fan controller....

[DerStig]

X Pack wrote:
Are you trying to pwm control the chassie fans? or the opt fans?

it would be way more easy if you told us

Take the pwm signal from the cpu_fan header..

Or get a pwm fan controller?

You cant use the opt and chassie fans as cpu_fan, and want them to adjust after cpu temp..

You can connect a temp prob to one of the opt fan header, and having that header temp controlled.. Stick the probe into the rad or something

pwr_fan> constant 12v feed
Cpu_ fan> cpu temp controlled
Opt-cpufan> optional cpu fan, it tag along with cpu_fan
Chassi fan> For using chassi fans, can be duty controlled and via profiles
Opt fans> Optional fans, can be used everywhere, and for having them adjust to the temp, you need a temp probe. else they can be adjusted via duty, and profiles also

i told you this already?

Or get a pwm fan controller....

My conclusion is that the CHA and OPT headers do NOT work in PWM mode. They work in DC mode only. That's why when I plug in a 4 pin cable with only 2 cables (yellow and blue) for PWM it doesn't work, but it does so with a 3 pin cable.

You CAN actually have chasis fans work based on a temperature in fanX software, I was thinking that would be the CPU temp. But regardless, as long as they dont spin at 100%, I dont care.

[DerStig]

As I mentioned earlier the cable is not drawing any power from the board it has a 4 pin molex that is directly connected to psu. I have tried connecting the cable to cpu or cpu opt headers and it works so the cable is fine.

If however I use a 3 pin splitter which is a simple y splitter which draws the power from the board things work. So to me this looks like the 4 pin headers for cha and opt are really useless as they dont run in pwm mode but just dc mode.

Please have a look at my first post and links to the cables I am using and it will make sense.