I usually open up Asus Probe once a day just to check on my temp and fan speeds. Well I open it up today, and I see this, my PSU fan, according to this is not moving at all. Now this is the second time this has happened, all I have to do is simply restart the computer and everything go back to normal, my PSU fan usually stays around 1500rpm. Do I need to be worried about this? Everything seems to be running fine, I just build this computer about two months ago, by the way the PSU is an Antec 350w, thanks.