New system was rolling along with relatively few hitches until today. As I boot up my system, as soon as the HD starts to revv up, the whole system loses power. After trying to start up 20 ar 25 times it finally allowed me to get on. I suspect a power supply problem, but it is strange I had no problems unti now. (about 2 weeks with new system). Could it be a spike at startup?
I have not overclocked anythiing and have no problem while I am on. Anybody got any ideals?

My cpu is well under the temp limit.
all fans are working.
My power supply is 350w, which is probably borderline for this system, but strange i have no lockups when I am pushing the graphics to the edge in il-2 and AH.