I'm using q-fan at the moment.
I have my front 20cm fan on my cpu header, my back noctua fan on chassis fan 1, and my dual noctua d-14 cpu fans on my chassis fan 2.
Why do you have the CPU fans on the CHA_FAN headers? Did you change the Q-FAN on the CPU_FAN from AUTO to ADVANCED?
BUT, as soon as I run prime95, my fans spin up for 3 seconds, and then turn off for 3 seconds, and repeat! My cpu temperature is <40C and happens at even 35C. It seems to be revving the fans up because of my high cpu usage. Is this a common practice? Is there a way to stop this?
Some fans dont like certain voltages and in some cases they need higher voltage to start then to keep spinning. Install AI Suite and enter FanXpert2 (or 3 not sure what version it will come with), and try to run the tunning, it will determine the minimum and maximum rpms for each fan, will also determine the minimum rpm to keep it running, etc.
This is almost more annoying than just having the fans always on because now I can hear them constantly changing.
On fanXpert you can set your own graph for rpms based on the temperature, once you establish the minimums you can try doing below the graph before certain temperature with a big jump toward covering the minimum spinnng that way they should spin once the temp is reached.
I just want my fans to work when the cpu gets hot, not when the cpu gets busy
. Any help and advice?
edit: z97m-plus with i7 4790k
Btw return the CPU fans to the CPU_FAN header, the chasis fans have much higher restriction on bios than the cpu_fan (at least on Z87, not sure on Z97), but if you run fanXpert all bios restrictions should be removed and they should drop as low as the fan was design or at least how FanXpert recognizes them. Depending on the fans that came with the D14 (the 2011 version has pwm fans the before has 3pin fans), you should change in the bios the Q-FAN from AUTO to ADVANCED to run the 3pin fans on the CPU_FAN header.
edit2: Okay, I've resigned to the fact that there must be some kind of hard-coded fan control which turns the fans up when cpu usage is high. This is quite a shame as otherwise I could potentially have a completely passively cooled system for general use. I'm just going to keep the fans on low constantly.
Btw i wouldnt run the 4970K fanless, mine can spike in second to 50C just simply webrowsing, this is with fans spinning at 500rpms, but without i bet i can pass 60 super easily. Give a shot to FanXpert, you might be able to still do what you want.