It might be worth considering the Phobya G14 Silent Black see http://www.xtremesystems.org/forums/showthread.php?273250-Phobya-Nano-G14-PWM-Black-Silent-Edition-Fan-Review
As to fan control, your Asus motherboard has similar facilities to other boards from this manufacturer. ... One thing you can do with the User profile is just set the lowest possible fan speed as a constant if your system can tolerate it, but at something like 75C processor temperature the fan speed will go to 100%.
Not too keen on the Phobya fans I'm afraid, but thanks!
Yup, I've set the BIOS control to manual and put it on the lowest RPM settings and set super high thresholds for temperatures as AMD Llano runs cool enough so my fan never throttles to 100%
It is actually just the opposite. All things equal smaller fans handle high static pressure better than larger fans. It is actually sort of logical, but also sort of hard to explain.
What isn't so logical is that by and large, the quietest fans seem to be 120mm fans. If you are looking for high SP performance plus quiet... go for the Scythe Gentle Typhoons. If you can still pick up an 800 rpm one, I would grab it.
Perhaps I didn't word it correctly, I did understand that smaller fans provide more static pressure, hence i chose a 140mm as I don't need the static pressure I believe (but I'm not 100% sure because I believe just running some airflow over the board is enough - I don't need to PUSH the air over the board)
I didn't know that the 120mm fans are quieter though, I've not actually seen a 120mm fan quieter than the Thermalright TY-140 and the Thermalright X-Silent 140mm. I'm not sure what happened to my Thermalright X-Silent though, I remember it was very quiet and I've been trying to find it in my storage boxes but not having any luck. Also tried to check if I sold it by no evidence either... I just remember it was a really good fan but it was only 3 pin.
Anyway, I think the thread is slightly missing the main question. I want to ask is there a neat way of running a 3 pin fan at a lower RPM without using BIOS or an adapter? I.e. can I solder something, or switch cables or something? I remember with molex powered fans, I could switch some cables and it'd run at a lower voltage. Could I for example solder the resistor on the fan wire?