Hallo nosTa
wenn die Lüfter am Mainboard angeschlossen sind sollte es mit SpeedFan gehen, allerdings muss man SpeedFan erst etwas anpassen, folgendes hab ich dazu in der SpeedFan-Hilfe gefunden:
We will take a closer look at the properties that appeared for the IT8712F since SpeedFan 4.19: "PWM x mode" and "PWMOUT clock". Up to SpeedFan 4.18, SpeedFan applied some custom settings when first detecting this chip. These settings allowed some computers to be able to change fan speeds, overriding some (eventually missing) settings applied by the BIOS. The fact that those settings were applied only upon detection caused the same settings to be overriden by the BIOS after a Resume from Hibernation, forcing you to restart SpeedFan to be able to change fan speeds again. Now those settings are no longer automatically applied. This means that some motherboards will no longer be able to change fan speeds. If this is your case, just enter CONFIG / ADVANCED and set "PWM x mode" to Software Controlled. I suggest you to set "PWMOUT clock" to 3M as this seems to be the best choice, but, if your fan is not too smooth when changing fan speeds or makes odd noises, you can try different settings.