Fan controller concerns

[Nocturnal]

I recently built a new rig. I put 4x Deltas that spin at 4000RPM and my heat sink/fan onto a Sunbeam rheobus fan controller. Each channel on the controller is rated for up to 30w.

Am I at risk if I change the fan speed throughout the day? Will I burn my power supply out by doing this? I'm not even sure if it has any negative affect seeing that the PSU has to give out a lot of power to the fans as I change them each one by one.

My system is as follows:

Seasonic M12D 850W
ASUS Rampage Formula X48
Intel QX9650 CPU @ 3.0GHz
1x300GB Velociraptor
1x1TB 7200.11 Seagate
eVGA Geforce GTX280 not overclocked
8GB Mushkin Red memory

Should I be concerned that I may be hurting the PSU if I change the fan speeds throughout the day?

Update: Another question, is it safe to turn the fan off completely? I'm trying to test something as I can hear some weird rattling as though a fan is spinning down on its own. I'm trying to rule this out. Will it be safe if I leave like 3 of the fans completely off while I test the others?

 

[thescreensavers]

No you will not burn your psu by changing fan speeds lol. Wattage constantly changes from idle to load.. So every so often changing your fan settings wont do anything.

 

[Nocturnal]

Thanks! I appreciate it. I'm far into this game but yet I still have a lot to learn.

 

[davidrees]

I think you are far more at risk of burning out your ear drums.