Fans busted out

I am having a desktop computer with Gigabyte EP45-DQ6 Intel P45 Motherboard with Vista Ultimate installed on it. It worked properly day before yesterday and turned off safely as normal. Yesterday when I turned on, the fans busted out.

I changed the PSU but the same thing happened once again.

What would be the probable cause in your opinion?

Might be PSU. Give some extra power to your computer i.e. use some high power psu and see whether the problem still retains or not? I am saying so because I think you might be lacking on power which probably the reason of the problem to get back again.

IMO it is due to either motherboard failure (or is in its last legs) or your ram is not properly placed. Just try to remove the ram and see what happens. Its obvious that you will hear a beep sound but other than that what?

Thanks guys for your reply. I will give it a try and see what happens. And by the way southparx my mobo is only one year old. So I don't think my mobo is faulty.